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  },m=function(e){return h(e,17)^h(e,19)^p(e,10)},_=function(e,t){var n,r,o,i,u,a,f,s,c,l,h,p,_=new Array(1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278,1426881987,1925078388,2162078206,2614888103,3248222580,3835390401,4022224774,264347078,604807628,770255983,1249150122,1555081692,1996064986,2554220882,2821834349,2952996808,3210313671,3336571891,3584528711,113926993,338241895,666307205,773529912,1294757372,1396182291,1695183700,1986661051,2177026350,2456956037,2730485921,2820302411,3259730800,3345764771,3516065817,3600352804,4094571909,275423344,430227734,506948616,659060556,883997877,958139571,1322822218,1537002063,1747873779,1955562222,2024104815,2227730452,2361852424,2428436474,2756734187,3204031479,3329325298),E=new Array(1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225),I=new Array(64);e[t>>5]|=128<<24-t%32,e[(t+64>>9<<4)+15]=t;for(var c=0;c<e.length;c+=16){n=E[0],r=E[1],o=E[2],i=E[3],u=E[4],a=E[5],f=E[6],s=E[7];for(var l=0;l<64;l++)l<16?I[l]=e[l+c]:I[l]=d(d(d(m(I[l-2]),I[l-7]),v(I[l-15])),I[l-16]),h=d(d(d(d(s,b(u)),y(u,a,f)),_[l]),I[l]),p=d(w(n),g(n,r,o)),s=f,f=a,a=u,u=d(i,h),i=o,o=r,r=n,n=d(h,p);E[0]=d(n,E[0]),E[1]=d(r,E[1]),E[2]=d(o,E[2]),E[3]=d(i,E[3]),E[4]=d(u,E[4]),E[5]=d(a,E[5]),E[6]=d(f,E[6]),E[7]=d(s,E[7])}return E};t.exports=function(e){return l.hash(e,_,32,!0)}}).call(this,e("lYpoI2"),"undefined"!=typeof self?self:"undefined"!=typeof window?window:{},e("buffer").Buffer,arguments[3],arguments[4],arguments[5],arguments[6],"/node_modules/gulp-browserify/node_modules/crypto-browserify/sha256.js","/node_modules/gulp-browserify/node_modules/crypto-browserify")},{"./helpers":4,buffer:3,lYpoI2:10}],10:[function(e,t,n){(function(e,n,r,o,i,u,a,f,s){function c(){}var e=t.exports={};e.nextTick=function(){var e="undefined"!=typeof window&&window.setImmediate,t="undefined"!=typeof window&&window.postMessage&&window.addEventListener;if(e)return function(e){return window.setImmediate(e)};if(t){var n=[];return window.addEventListener("message",function(e){var t=e.source;if((t===window||null===t)&&"process-tick"===e.data&&(e.stopPropagation(),n.length>0)){var r=n.shift();r()}},!0),function(e){n.push(e),window.postMessage("process-tick","*")}}return function(e){setTimeout(e,0)}}(),e.title="browser",e.browser=!0,e.env={},e.argv=[],e.on=c,e.addListener=c,e.once=c,e.off=c,e.removeListener=c,e.removeAllListeners=c,e.emit=c,e.binding=function(e){throw new Error("process.binding is not supported")},e.cwd=function(){return"/"},e.chdir=function(e){throw new Error("process.chdir is not supported")}}).call(this,e("lYpoI2"),"undefined"!=typeof self?self:"undefined"!=typeof window?window:{},e("buffer").Buffer,arguments[3],arguments[4],arguments[5],arguments[6],"/node_modules/gulp-browserify/node_modules/process/browser.js","/node_modules/gulp-browserify/node_modules/process")},{buffer:3,lYpoI2:10}],11:[function(e,t,n){(function(e,t,r,o,i,u,a,f,s){n.read=function(e,t,n,r,o){var i,u,a=8*o-r-1,f=(1<<a)-1,s=f>>1,c=-7,l=n?o-1:0,d=n?-1:1,h=e[t+l];for(l+=d,i=h&(1<<-c)-1,h>>=-c,c+=a;c>0;i=256*i+e[t+l],l+=d,c-=8);for(u=i&(1<<-c)-1,i>>=-c,c+=r;c>0;u=256*u+e[t+l],l+=d,c-=8);if(0===i)i=1-s;else{if(i===f)return u?NaN:(h?-1:1)*(1/0);u+=Math.pow(2,r),i-=s}return(h?-1:1)*u*Math.pow(2,i-r)},n.write=function(e,t,n,r,o,i){var u,a,f,s=8*i-o-1,c=(1<<s)-1,l=c>>1,d=23===o?Math.pow(2,-24)-Math.pow(2,-77):0,h=r?0:i-1,p=r?1:-1,y=t<0||0===t&&1/t<0?1:0;for(t=Math.abs(t),isNaN(t)||t===1/0?(a=isNaN(t)?1:0,u=c):(u=Math.floor(Math.log(t)/Math.LN2),t*(f=Math.pow(2,-u))<1&&(u--,f*=2),t+=u+l>=1?d/f:d*Math.pow(2,1-l),t*f>=2&&(u++,f/=2),u+l>=c?(a=0,u=c):u+l>=1?(a=(t*f-1)*Math.pow(2,o),u+=l):(a=t*Math.pow(2,l-1)*Math.pow(2,o),u=0));o>=8;e[n+h]=255&a,h+=p,a/=256,o-=8);for(u=u<<o|a,s+=o;s>0;e[n+h]=255&u,h+=p,u/=256,s-=8);e[n+h-p]|=128*y}}).call(this,e("lYpoI2"),"undefined"!=typeof self?self:"undefined"!=typeof window?window:{},e("buffer").Buffer,arguments[3],arguments[4],arguments[5],arguments[6],"/node_modules/ieee754/index.js","/node_modules/ieee754")},{buffer:3,lYpoI2:10}]},{},[1])(1)});
  }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  },{}],2:[function(require,module,exports){
  // http://wiki.commonjs.org/wiki/Unit_Testing/1.0
  //
  // THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
  //
  // Originally from narwhal.js (http://narwhaljs.org)
  // Copyright (c) 2009 Thomas Robinson <280north.com>
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the 'Software'), to
  // deal in the Software without restriction, including without limitation the
  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  // sell copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // when used in node, this will actually load the util module we depend on
  // versus loading the builtin util module as happens otherwise
  // this is a bug in node module loading as far as I am concerned
  var util = require('util/');
  
  var pSlice = Array.prototype.slice;
  var hasOwn = Object.prototype.hasOwnProperty;
  
  // 1. The assert module provides functions that throw
  // AssertionError's when particular conditions are not met. The
  // assert module must conform to the following interface.
  
  var assert = module.exports = ok;
  
  // 2. The AssertionError is defined in assert.
  // new assert.AssertionError({ message: message,
  //                             actual: actual,
  //                             expected: expected })
  
  assert.AssertionError = function AssertionError(options) {
    this.name = 'AssertionError';
    this.actual = options.actual;
    this.expected = options.expected;
    this.operator = options.operator;
    if (options.message) {
      this.message = options.message;
      this.generatedMessage = false;
    } else {
      this.message = getMessage(this);
      this.generatedMessage = true;
    }
    var stackStartFunction = options.stackStartFunction || fail;
  
    if (Error.captureStackTrace) {
      Error.captureStackTrace(this, stackStartFunction);
    }
    else {
      // non v8 browsers so we can have a stacktrace
      var err = new Error();
      if (err.stack) {
        var out = err.stack;
  
        // try to strip useless frames
        var fn_name = stackStartFunction.name;
        var idx = out.indexOf('\n' + fn_name);
        if (idx >= 0) {
          // once we have located the function frame
          // we need to strip out everything before it (and its line)
          var next_line = out.indexOf('\n', idx + 1);
          out = out.substring(next_line + 1);
        }
  
        this.stack = out;
      }
    }
  };
  
  // assert.AssertionError instanceof Error
  util.inherits(assert.AssertionError, Error);
  
  function replacer(key, value) {
    if (util.isUndefined(value)) {
      return '' + value;
    }
    if (util.isNumber(value) && (isNaN(value) || !isFinite(value))) {
      return value.toString();
    }
    if (util.isFunction(value) || util.isRegExp(value)) {
      return value.toString();
    }
    return value;
  }
  
  function truncate(s, n) {
    if (util.isString(s)) {
      return s.length < n ? s : s.slice(0, n);
    } else {
      return s;
    }
  }
  
  function getMessage(self) {
    return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
           self.operator + ' ' +
           truncate(JSON.stringify(self.expected, replacer), 128);
  }
  
  // At present only the three keys mentioned above are used and
  // understood by the spec. Implementations or sub modules can pass
  // other keys to the AssertionError's constructor - they will be
  // ignored.
  
  // 3. All of the following functions must throw an AssertionError
  // when a corresponding condition is not met, with a message that
  // may be undefined if not provided.  All assertion methods provide
  // both the actual and expected values to the assertion error for
  // display purposes.
  
  function fail(actual, expected, message, operator, stackStartFunction) {
    throw new assert.AssertionError({
      message: message,
      actual: actual,
      expected: expected,
      operator: operator,
      stackStartFunction: stackStartFunction
    });
  }
  
  // EXTENSION! allows for well behaved errors defined elsewhere.
  assert.fail = fail;
  
  // 4. Pure assertion tests whether a value is truthy, as determined
  // by !!guard.
  // assert.ok(guard, message_opt);
  // This statement is equivalent to assert.equal(true, !!guard,
  // message_opt);. To test strictly for the value true, use
  // assert.strictEqual(true, guard, message_opt);.
  
  function ok(value, message) {
    if (!value) fail(value, true, message, '==', assert.ok);
  }
  assert.ok = ok;
  
  // 5. The equality assertion tests shallow, coercive equality with
  // ==.
  // assert.equal(actual, expected, message_opt);
  
  assert.equal = function equal(actual, expected, message) {
    if (actual != expected) fail(actual, expected, message, '==', assert.equal);
  };
  
  // 6. The non-equality assertion tests for whether two objects are not equal
  // with != assert.notEqual(actual, expected, message_opt);
  
  assert.notEqual = function notEqual(actual, expected, message) {
    if (actual == expected) {
      fail(actual, expected, message, '!=', assert.notEqual);
    }
  };
  
  // 7. The equivalence assertion tests a deep equality relation.
  // assert.deepEqual(actual, expected, message_opt);
  
  assert.deepEqual = function deepEqual(actual, expected, message) {
    if (!_deepEqual(actual, expected)) {
      fail(actual, expected, message, 'deepEqual', assert.deepEqual);
    }
  };
  
  function _deepEqual(actual, expected) {
    // 7.1. All identical values are equivalent, as determined by ===.
    if (actual === expected) {
      return true;
  
    } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
      if (actual.length != expected.length) return false;
  
      for (var i = 0; i < actual.length; i++) {
        if (actual[i] !== expected[i]) return false;
      }
  
      return true;
  
    // 7.2. If the expected value is a Date object, the actual value is
    // equivalent if it is also a Date object that refers to the same time.
    } else if (util.isDate(actual) && util.isDate(expected)) {
      return actual.getTime() === expected.getTime();
  
    // 7.3 If the expected value is a RegExp object, the actual value is
    // equivalent if it is also a RegExp object with the same source and
    // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
    } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
      return actual.source === expected.source &&
             actual.global === expected.global &&
             actual.multiline === expected.multiline &&
             actual.lastIndex === expected.lastIndex &&
             actual.ignoreCase === expected.ignoreCase;
  
    // 7.4. Other pairs that do not both pass typeof value == 'object',
    // equivalence is determined by ==.
    } else if (!util.isObject(actual) && !util.isObject(expected)) {
      return actual == expected;
  
    // 7.5 For all other Object pairs, including Array objects, equivalence is
    // determined by having the same number of owned properties (as verified
    // with Object.prototype.hasOwnProperty.call), the same set of keys
    // (although not necessarily the same order), equivalent values for every
    // corresponding key, and an identical 'prototype' property. Note: this
    // accounts for both named and indexed properties on Arrays.
    } else {
      return objEquiv(actual, expected);
    }
  }
  
  function isArguments(object) {
    return Object.prototype.toString.call(object) == '[object Arguments]';
  }
  
  function objEquiv(a, b) {
    if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
      return false;
    // an identical 'prototype' property.
    if (a.prototype !== b.prototype) return false;
    //~~~I've managed to break Object.keys through screwy arguments passing.
    //   Converting to array solves the problem.
    if (isArguments(a)) {
      if (!isArguments(b)) {
        return false;
      }
      a = pSlice.call(a);
      b = pSlice.call(b);
      return _deepEqual(a, b);
    }
    try {
      var ka = objectKeys(a),
          kb = objectKeys(b),
          key, i;
    } catch (e) {//happens when one is a string literal and the other isn't
      return false;
    }
    // having the same number of owned properties (keys incorporates
    // hasOwnProperty)
    if (ka.length != kb.length)
      return false;
    //the same set of keys (although not necessarily the same order),
    ka.sort();
    kb.sort();
    //~~~cheap key test
    for (i = ka.length - 1; i >= 0; i--) {
      if (ka[i] != kb[i])
        return false;
    }
    //equivalent values for every corresponding key, and
    //~~~possibly expensive deep test
    for (i = ka.length - 1; i >= 0; i--) {
      key = ka[i];
      if (!_deepEqual(a[key], b[key])) return false;
    }
    return true;
  }
  
  // 8. The non-equivalence assertion tests for any deep inequality.
  // assert.notDeepEqual(actual, expected, message_opt);
  
  assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
    if (_deepEqual(actual, expected)) {
      fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
    }
  };
  
  // 9. The strict equality assertion tests strict equality, as determined by ===.
  // assert.strictEqual(actual, expected, message_opt);
  
  assert.strictEqual = function strictEqual(actual, expected, message) {
    if (actual !== expected) {
      fail(actual, expected, message, '===', assert.strictEqual);
    }
  };
  
  // 10. The strict non-equality assertion tests for strict inequality, as
  // determined by !==.  assert.notStrictEqual(actual, expected, message_opt);
  
  assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
    if (actual === expected) {
      fail(actual, expected, message, '!==', assert.notStrictEqual);
    }
  };
  
  function expectedException(actual, expected) {
    if (!actual || !expected) {
      return false;
    }
  
    if (Object.prototype.toString.call(expected) == '[object RegExp]') {
      return expected.test(actual);
    } else if (actual instanceof expected) {
      return true;
    } else if (expected.call({}, actual) === true) {
      return true;
    }
  
    return false;
  }
  
  function _throws(shouldThrow, block, expected, message) {
    var actual;
  
    if (util.isString(expected)) {
      message = expected;
      expected = null;
    }
  
    try {
      block();
    } catch (e) {
      actual = e;
    }
  
    message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
              (message ? ' ' + message : '.');
  
    if (shouldThrow && !actual) {
      fail(actual, expected, 'Missing expected exception' + message);
    }
  
    if (!shouldThrow && expectedException(actual, expected)) {
      fail(actual, expected, 'Got unwanted exception' + message);
    }
  
    if ((shouldThrow && actual && expected &&
        !expectedException(actual, expected)) || (!shouldThrow && actual)) {
      throw actual;
    }
  }
  
  // 11. Expected to throw an error:
  // assert.throws(block, Error_opt, message_opt);
  
  assert.throws = function(block, /*optional*/error, /*optional*/message) {
    _throws.apply(this, [true].concat(pSlice.call(arguments)));
  };
  
  // EXTENSION! This is annoying to write outside this module.
  assert.doesNotThrow = function(block, /*optional*/message) {
    _throws.apply(this, [false].concat(pSlice.call(arguments)));
  };
  
  assert.ifError = function(err) { if (err) {throw err;}};
  
  var objectKeys = Object.keys || function (obj) {
    var keys = [];
    for (var key in obj) {
      if (hasOwn.call(obj, key)) keys.push(key);
    }
    return keys;
  };
  
  },{"util/":19}],3:[function(require,module,exports){
  var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
  
  ;(function (exports) {
  	'use strict';
  
    var Arr = (typeof Uint8Array !== 'undefined')
      ? Uint8Array
      : Array
  
  	var PLUS   = '+'.charCodeAt(0)
  	var SLASH  = '/'.charCodeAt(0)
  	var NUMBER = '0'.charCodeAt(0)
  	var LOWER  = 'a'.charCodeAt(0)
  	var UPPER  = 'A'.charCodeAt(0)
  	var PLUS_URL_SAFE = '-'.charCodeAt(0)
  	var SLASH_URL_SAFE = '_'.charCodeAt(0)
  
  	function decode (elt) {
  		var code = elt.charCodeAt(0)
  		if (code === PLUS ||
  		    code === PLUS_URL_SAFE)
  			return 62 // '+'
  		if (code === SLASH ||
  		    code === SLASH_URL_SAFE)
  			return 63 // '/'
  		if (code < NUMBER)
  			return -1 //no match
  		if (code < NUMBER + 10)
  			return code - NUMBER + 26 + 26
  		if (code < UPPER + 26)
  			return code - UPPER
  		if (code < LOWER + 26)
  			return code - LOWER + 26
  	}
  
  	function b64ToByteArray (b64) {
  		var i, j, l, tmp, placeHolders, arr
  
  		if (b64.length % 4 > 0) {
  			throw new Error('Invalid string. Length must be a multiple of 4')
  		}
  
  		// the number of equal signs (place holders)
  		// if there are two placeholders, than the two characters before it
  		// represent one byte
  		// if there is only one, then the three characters before it represent 2 bytes
  		// this is just a cheap hack to not do indexOf twice
  		var len = b64.length
  		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
  
  		// base64 is 4/3 + up to two characters of the original data
  		arr = new Arr(b64.length * 3 / 4 - placeHolders)
  
  		// if there are placeholders, only get up to the last complete 4 chars
  		l = placeHolders > 0 ? b64.length - 4 : b64.length
  
  		var L = 0
  
  		function push (v) {
  			arr[L++] = v
  		}
  
  		for (i = 0, j = 0; i < l; i += 4, j += 3) {
  			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
  			push((tmp & 0xFF0000) >> 16)
  			push((tmp & 0xFF00) >> 8)
  			push(tmp & 0xFF)
  		}
  
  		if (placeHolders === 2) {
  			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
  			push(tmp & 0xFF)
  		} else if (placeHolders === 1) {
  			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
  			push((tmp >> 8) & 0xFF)
  			push(tmp & 0xFF)
  		}
  
  		return arr
  	}
  
  	function uint8ToBase64 (uint8) {
  		var i,
  			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
  			output = "",
  			temp, length
  
  		function encode (num) {
  			return lookup.charAt(num)
  		}
  
  		function tripletToBase64 (num) {
  			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
  		}
  
  		// go through the array every three bytes, we'll deal with trailing stuff later
  		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
  			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
  			output += tripletToBase64(temp)
  		}
  
  		// pad the end with zeros, but make sure to not forget the extra bytes
  		switch (extraBytes) {
  			case 1:
  				temp = uint8[uint8.length - 1]
  				output += encode(temp >> 2)
  				output += encode((temp << 4) & 0x3F)
  				output += '=='
  				break
  			case 2:
  				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
  				output += encode(temp >> 10)
  				output += encode((temp >> 4) & 0x3F)
  				output += encode((temp << 2) & 0x3F)
  				output += '='
  				break
  		}
  
  		return output
  	}
  
  	exports.toByteArray = b64ToByteArray
  	exports.fromByteArray = uint8ToBase64
  }(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
  
  },{}],4:[function(require,module,exports){
  /*!
   * The buffer module from node.js, for the browser.
   *
   * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
   * @license  MIT
   */
  
  var base64 = require('base64-js')
  var ieee754 = require('ieee754')
  
  exports.Buffer = Buffer
  exports.SlowBuffer = Buffer
  exports.INSPECT_MAX_BYTES = 50
  Buffer.poolSize = 8192
  
  /**
   * If `Buffer._useTypedArrays`:
   *   === true    Use Uint8Array implementation (fastest)
   *   === false   Use Object implementation (compatible down to IE6)
   */
  Buffer._useTypedArrays = (function () {
    // Detect if browser supports Typed Arrays. Supported browsers are IE 10+, Firefox 4+,
    // Chrome 7+, Safari 5.1+, Opera 11.6+, iOS 4.2+. If the browser does not support adding
    // properties to `Uint8Array` instances, then that's the same as no `Uint8Array` support
    // because we need to be able to add all the node Buffer API methods. This is an issue
    // in Firefox 4-29. Now fixed: https://bugzilla.mozilla.org/show_bug.cgi?id=695438
    try {
      var buf = new ArrayBuffer(0)
      var arr = new Uint8Array(buf)
      arr.foo = function () { return 42 }
      return 42 === arr.foo() &&
          typeof arr.subarray === 'function' // Chrome 9-10 lack `subarray`
    } catch (e) {
      return false
    }
  })()
  
  /**
   * Class: Buffer
   * =============
   *
   * The Buffer constructor returns instances of `Uint8Array` that are augmented
   * with function properties for all the node `Buffer` API functions. We use
   * `Uint8Array` so that square bracket notation works as expected -- it returns
   * a single octet.
   *
   * By augmenting the instances, we can avoid modifying the `Uint8Array`
   * prototype.
   */
  function Buffer (subject, encoding, noZero) {
    if (!(this instanceof Buffer))
      return new Buffer(subject, encoding, noZero)
  
    var type = typeof subject
  
    // Workaround: node's base64 implementation allows for non-padded strings
    // while base64-js does not.
    if (encoding === 'base64' && type === 'string') {
      subject = stringtrim(subject)
      while (subject.length % 4 !== 0) {
        subject = subject + '='
      }
    }
  
    // Find the length
    var length
    if (type === 'number')
      length = coerce(subject)
    else if (type === 'string')
      length = Buffer.byteLength(subject, encoding)
    else if (type === 'object')
      length = coerce(subject.length) // assume that object is array-like
    else
      throw new Error('First argument needs to be a number, array or string.')
  
    var buf
    if (Buffer._useTypedArrays) {
      // Preferred: Return an augmented `Uint8Array` instance for best performance
      buf = Buffer._augment(new Uint8Array(length))
    } else {
      // Fallback: Return THIS instance of Buffer (created by `new`)
      buf = this
      buf.length = length
      buf._isBuffer = true
    }
  
    var i
    if (Buffer._useTypedArrays && typeof subject.byteLength === 'number') {
      // Speed optimization -- use set if we're copying from a typed array
      buf._set(subject)
    } else if (isArrayish(subject)) {
      // Treat array-ish objects as a byte array
      for (i = 0; i < length; i++) {
        if (Buffer.isBuffer(subject))
          buf[i] = subject.readUInt8(i)
        else
          buf[i] = subject[i]
      }
    } else if (type === 'string') {
      buf.write(subject, 0, encoding)
    } else if (type === 'number' && !Buffer._useTypedArrays && !noZero) {
      for (i = 0; i < length; i++) {
        buf[i] = 0
      }
    }
  
    return buf
  }
  
  // STATIC METHODS
  // ==============
  
  Buffer.isEncoding = function (encoding) {
    switch (String(encoding).toLowerCase()) {
      case 'hex':
      case 'utf8':
      case 'utf-8':
      case 'ascii':
      case 'binary':
      case 'base64':
      case 'raw':
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return true
      default:
        return false
    }
  }
  
  Buffer.isBuffer = function (b) {
    return !!(b !== null && b !== undefined && b._isBuffer)
  }
  
  Buffer.byteLength = function (str, encoding) {
    var ret
    str = str + ''
    switch (encoding || 'utf8') {
      case 'hex':
        ret = str.length / 2
        break
      case 'utf8':
      case 'utf-8':
        ret = utf8ToBytes(str).length
        break
      case 'ascii':
      case 'binary':
      case 'raw':
        ret = str.length
        break
      case 'base64':
        ret = base64ToBytes(str).length
        break
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        ret = str.length * 2
        break
      default:
        throw new Error('Unknown encoding')
    }
    return ret
  }
  
  Buffer.concat = function (list, totalLength) {
    assert(isArray(list), 'Usage: Buffer.concat(list, [totalLength])\n' +
        'list should be an Array.')
  
    if (list.length === 0) {
      return new Buffer(0)
    } else if (list.length === 1) {
      return list[0]
    }
  
    var i
    if (typeof totalLength !== 'number') {
      totalLength = 0
      for (i = 0; i < list.length; i++) {
        totalLength += list[i].length
      }
    }
  
    var buf = new Buffer(totalLength)
    var pos = 0
    for (i = 0; i < list.length; i++) {
      var item = list[i]
      item.copy(buf, pos)
      pos += item.length
    }
    return buf
  }
  
  // BUFFER INSTANCE METHODS
  // =======================
  
  function _hexWrite (buf, string, offset, length) {
    offset = Number(offset) || 0
    var remaining = buf.length - offset
    if (!length) {
      length = remaining
    } else {
      length = Number(length)
      if (length > remaining) {
        length = remaining
      }
    }
  
    // must be an even number of digits
    var strLen = string.length
    assert(strLen % 2 === 0, 'Invalid hex string')
  
    if (length > strLen / 2) {
      length = strLen / 2
    }
    for (var i = 0; i < length; i++) {
      var byte = parseInt(string.substr(i * 2, 2), 16)
      assert(!isNaN(byte), 'Invalid hex string')
      buf[offset + i] = byte
    }
    Buffer._charsWritten = i * 2
    return i
  }
  
  function _utf8Write (buf, string, offset, length) {
    var charsWritten = Buffer._charsWritten =
      blitBuffer(utf8ToBytes(string), buf, offset, length)
    return charsWritten
  }
  
  function _asciiWrite (buf, string, offset, length) {
    var charsWritten = Buffer._charsWritten =
      blitBuffer(asciiToBytes(string), buf, offset, length)
    return charsWritten
  }
  
  function _binaryWrite (buf, string, offset, length) {
    return _asciiWrite(buf, string, offset, length)
  }
  
  function _base64Write (buf, string, offset, length) {
    var charsWritten = Buffer._charsWritten =
      blitBuffer(base64ToBytes(string), buf, offset, length)
    return charsWritten
  }
  
  function _utf16leWrite (buf, string, offset, length) {
    var charsWritten = Buffer._charsWritten =
      blitBuffer(utf16leToBytes(string), buf, offset, length)
    return charsWritten
  }
  
  Buffer.prototype.write = function (string, offset, length, encoding) {
    // Support both (string, offset, length, encoding)
    // and the legacy (string, encoding, offset, length)
    if (isFinite(offset)) {
      if (!isFinite(length)) {
        encoding = length
        length = undefined
      }
    } else {  // legacy
      var swap = encoding
      encoding = offset
      offset = length
      length = swap
    }
  
    offset = Number(offset) || 0
    var remaining = this.length - offset
    if (!length) {
      length = remaining
    } else {
      length = Number(length)
      if (length > remaining) {
        length = remaining
      }
    }
    encoding = String(encoding || 'utf8').toLowerCase()
  
    var ret
    switch (encoding) {
      case 'hex':
        ret = _hexWrite(this, string, offset, length)
        break
      case 'utf8':
      case 'utf-8':
        ret = _utf8Write(this, string, offset, length)
        break
      case 'ascii':
        ret = _asciiWrite(this, string, offset, length)
        break
      case 'binary':
        ret = _binaryWrite(this, string, offset, length)
        break
      case 'base64':
        ret = _base64Write(this, string, offset, length)
        break
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        ret = _utf16leWrite(this, string, offset, length)
        break
      default:
        throw new Error('Unknown encoding')
    }
    return ret
  }
  
  Buffer.prototype.toString = function (encoding, start, end) {
    var self = this
  
    encoding = String(encoding || 'utf8').toLowerCase()
    start = Number(start) || 0
    end = (end !== undefined)
      ? Number(end)
      : end = self.length
  
    // Fastpath empty strings
    if (end === start)
      return ''
  
    var ret
    switch (encoding) {
      case 'hex':
        ret = _hexSlice(self, start, end)
        break
      case 'utf8':
      case 'utf-8':
        ret = _utf8Slice(self, start, end)
        break
      case 'ascii':
        ret = _asciiSlice(self, start, end)
        break
      case 'binary':
        ret = _binarySlice(self, start, end)
        break
      case 'base64':
        ret = _base64Slice(self, start, end)
        break
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        ret = _utf16leSlice(self, start, end)
        break
      default:
        throw new Error('Unknown encoding')
    }
    return ret
  }
  
  Buffer.prototype.toJSON = function () {
    return {
      type: 'Buffer',
      data: Array.prototype.slice.call(this._arr || this, 0)
    }
  }
  
  // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
  Buffer.prototype.copy = function (target, target_start, start, end) {
    var source = this
  
    if (!start) start = 0
    if (!end && end !== 0) end = this.length
    if (!target_start) target_start = 0
  
    // Copy 0 bytes; we're done
    if (end === start) return
    if (target.length === 0 || source.length === 0) return
  
    // Fatal error conditions
    assert(end >= start, 'sourceEnd < sourceStart')
    assert(target_start >= 0 && target_start < target.length,
        'targetStart out of bounds')
    assert(start >= 0 && start < source.length, 'sourceStart out of bounds')
    assert(end >= 0 && end <= source.length, 'sourceEnd out of bounds')
  
    // Are we oob?
    if (end > this.length)
      end = this.length
    if (target.length - target_start < end - start)
      end = target.length - target_start + start
  
    var len = end - start
  
    if (len < 100 || !Buffer._useTypedArrays) {
      for (var i = 0; i < len; i++)
        target[i + target_start] = this[i + start]
    } else {
      target._set(this.subarray(start, start + len), target_start)
    }
  }
  
  function _base64Slice (buf, start, end) {
    if (start === 0 && end === buf.length) {
      return base64.fromByteArray(buf)
    } else {
      return base64.fromByteArray(buf.slice(start, end))
    }
  }
  
  function _utf8Slice (buf, start, end) {
    var res = ''
    var tmp = ''
    end = Math.min(buf.length, end)
  
    for (var i = start; i < end; i++) {
      if (buf[i] <= 0x7F) {
        res += decodeUtf8Char(tmp) + String.fromCharCode(buf[i])
        tmp = ''
      } else {
        tmp += '%' + buf[i].toString(16)
      }
    }
  
    return res + decodeUtf8Char(tmp)
  }
  
  function _asciiSlice (buf, start, end) {
    var ret = ''
    end = Math.min(buf.length, end)
  
    for (var i = start; i < end; i++)
      ret += String.fromCharCode(buf[i])
    return ret
  }
  
  function _binarySlice (buf, start, end) {
    return _asciiSlice(buf, start, end)
  }
  
  function _hexSlice (buf, start, end) {
    var len = buf.length
  
    if (!start || start < 0) start = 0
    if (!end || end < 0 || end > len) end = len
  
    var out = ''
    for (var i = start; i < end; i++) {
      out += toHex(buf[i])
    }
    return out
  }
  
  function _utf16leSlice (buf, start, end) {
    var bytes = buf.slice(start, end)
    var res = ''
    for (var i = 0; i < bytes.length; i += 2) {
      res += String.fromCharCode(bytes[i] + bytes[i+1] * 256)
    }
    return res
  }
  
  Buffer.prototype.slice = function (start, end) {
    var len = this.length
    start = clamp(start, len, 0)
    end = clamp(end, len, len)
  
    if (Buffer._useTypedArrays) {
      return Buffer._augment(this.subarray(start, end))
    } else {
      var sliceLen = end - start
      var newBuf = new Buffer(sliceLen, undefined, true)
      for (var i = 0; i < sliceLen; i++) {
        newBuf[i] = this[i + start]
      }
      return newBuf
    }
  }
  
  // `get` will be removed in Node 0.13+
  Buffer.prototype.get = function (offset) {
    console.log('.get() is deprecated. Access using array indexes instead.')
    return this.readUInt8(offset)
  }
  
  // `set` will be removed in Node 0.13+
  Buffer.prototype.set = function (v, offset) {
    console.log('.set() is deprecated. Access using array indexes instead.')
    return this.writeUInt8(v, offset)
  }
  
  Buffer.prototype.readUInt8 = function (offset, noAssert) {
    if (!noAssert) {
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset < this.length, 'Trying to read beyond buffer length')
    }
  
    if (offset >= this.length)
      return
  
    return this[offset]
  }
  
  function _readUInt16 (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 1 < buf.length, 'Trying to read beyond buffer length')
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    var val
    if (littleEndian) {
      val = buf[offset]
      if (offset + 1 < len)
        val |= buf[offset + 1] << 8
    } else {
      val = buf[offset] << 8
      if (offset + 1 < len)
        val |= buf[offset + 1]
    }
    return val
  }
  
  Buffer.prototype.readUInt16LE = function (offset, noAssert) {
    return _readUInt16(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readUInt16BE = function (offset, noAssert) {
    return _readUInt16(this, offset, false, noAssert)
  }
  
  function _readUInt32 (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    var val
    if (littleEndian) {
      if (offset + 2 < len)
        val = buf[offset + 2] << 16
      if (offset + 1 < len)
        val |= buf[offset + 1] << 8
      val |= buf[offset]
      if (offset + 3 < len)
        val = val + (buf[offset + 3] << 24 >>> 0)
    } else {
      if (offset + 1 < len)
        val = buf[offset + 1] << 16
      if (offset + 2 < len)
        val |= buf[offset + 2] << 8
      if (offset + 3 < len)
        val |= buf[offset + 3]
      val = val + (buf[offset] << 24 >>> 0)
    }
    return val
  }
  
  Buffer.prototype.readUInt32LE = function (offset, noAssert) {
    return _readUInt32(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readUInt32BE = function (offset, noAssert) {
    return _readUInt32(this, offset, false, noAssert)
  }
  
  Buffer.prototype.readInt8 = function (offset, noAssert) {
    if (!noAssert) {
      assert(offset !== undefined && offset !== null,
          'missing offset')
      assert(offset < this.length, 'Trying to read beyond buffer length')
    }
  
    if (offset >= this.length)
      return
  
    var neg = this[offset] & 0x80
    if (neg)
      return (0xff - this[offset] + 1) * -1
    else
      return this[offset]
  }
  
  function _readInt16 (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 1 < buf.length, 'Trying to read beyond buffer length')
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    var val = _readUInt16(buf, offset, littleEndian, true)
    var neg = val & 0x8000
    if (neg)
      return (0xffff - val + 1) * -1
    else
      return val
  }
  
  Buffer.prototype.readInt16LE = function (offset, noAssert) {
    return _readInt16(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readInt16BE = function (offset, noAssert) {
    return _readInt16(this, offset, false, noAssert)
  }
  
  function _readInt32 (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    var val = _readUInt32(buf, offset, littleEndian, true)
    var neg = val & 0x80000000
    if (neg)
      return (0xffffffff - val + 1) * -1
    else
      return val
  }
  
  Buffer.prototype.readInt32LE = function (offset, noAssert) {
    return _readInt32(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readInt32BE = function (offset, noAssert) {
    return _readInt32(this, offset, false, noAssert)
  }
  
  function _readFloat (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset + 3 < buf.length, 'Trying to read beyond buffer length')
    }
  
    return ieee754.read(buf, offset, littleEndian, 23, 4)
  }
  
  Buffer.prototype.readFloatLE = function (offset, noAssert) {
    return _readFloat(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readFloatBE = function (offset, noAssert) {
    return _readFloat(this, offset, false, noAssert)
  }
  
  function _readDouble (buf, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset + 7 < buf.length, 'Trying to read beyond buffer length')
    }
  
    return ieee754.read(buf, offset, littleEndian, 52, 8)
  }
  
  Buffer.prototype.readDoubleLE = function (offset, noAssert) {
    return _readDouble(this, offset, true, noAssert)
  }
  
  Buffer.prototype.readDoubleBE = function (offset, noAssert) {
    return _readDouble(this, offset, false, noAssert)
  }
  
  Buffer.prototype.writeUInt8 = function (value, offset, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset < this.length, 'trying to write beyond buffer length')
      verifuint(value, 0xff)
    }
  
    if (offset >= this.length) return
  
    this[offset] = value
  }
  
  function _writeUInt16 (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 1 < buf.length, 'trying to write beyond buffer length')
      verifuint(value, 0xffff)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    for (var i = 0, j = Math.min(len - offset, 2); i < j; i++) {
      buf[offset + i] =
          (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
              (littleEndian ? i : 1 - i) * 8
    }
  }
  
  Buffer.prototype.writeUInt16LE = function (value, offset, noAssert) {
    _writeUInt16(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeUInt16BE = function (value, offset, noAssert) {
    _writeUInt16(this, value, offset, false, noAssert)
  }
  
  function _writeUInt32 (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 3 < buf.length, 'trying to write beyond buffer length')
      verifuint(value, 0xffffffff)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    for (var i = 0, j = Math.min(len - offset, 4); i < j; i++) {
      buf[offset + i] =
          (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
    }
  }
  
  Buffer.prototype.writeUInt32LE = function (value, offset, noAssert) {
    _writeUInt32(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeUInt32BE = function (value, offset, noAssert) {
    _writeUInt32(this, value, offset, false, noAssert)
  }
  
  Buffer.prototype.writeInt8 = function (value, offset, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset < this.length, 'Trying to write beyond buffer length')
      verifsint(value, 0x7f, -0x80)
    }
  
    if (offset >= this.length)
      return
  
    if (value >= 0)
      this.writeUInt8(value, offset, noAssert)
    else
      this.writeUInt8(0xff + value + 1, offset, noAssert)
  }
  
  function _writeInt16 (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 1 < buf.length, 'Trying to write beyond buffer length')
      verifsint(value, 0x7fff, -0x8000)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    if (value >= 0)
      _writeUInt16(buf, value, offset, littleEndian, noAssert)
    else
      _writeUInt16(buf, 0xffff + value + 1, offset, littleEndian, noAssert)
  }
  
  Buffer.prototype.writeInt16LE = function (value, offset, noAssert) {
    _writeInt16(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeInt16BE = function (value, offset, noAssert) {
    _writeInt16(this, value, offset, false, noAssert)
  }
  
  function _writeInt32 (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 3 < buf.length, 'Trying to write beyond buffer length')
      verifsint(value, 0x7fffffff, -0x80000000)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    if (value >= 0)
      _writeUInt32(buf, value, offset, littleEndian, noAssert)
    else
      _writeUInt32(buf, 0xffffffff + value + 1, offset, littleEndian, noAssert)
  }
  
  Buffer.prototype.writeInt32LE = function (value, offset, noAssert) {
    _writeInt32(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeInt32BE = function (value, offset, noAssert) {
    _writeInt32(this, value, offset, false, noAssert)
  }
  
  function _writeFloat (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 3 < buf.length, 'Trying to write beyond buffer length')
      verifIEEE754(value, 3.4028234663852886e+38, -3.4028234663852886e+38)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    ieee754.write(buf, value, offset, littleEndian, 23, 4)
  }
  
  Buffer.prototype.writeFloatLE = function (value, offset, noAssert) {
    _writeFloat(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeFloatBE = function (value, offset, noAssert) {
    _writeFloat(this, value, offset, false, noAssert)
  }
  
  function _writeDouble (buf, value, offset, littleEndian, noAssert) {
    if (!noAssert) {
      assert(value !== undefined && value !== null, 'missing value')
      assert(typeof littleEndian === 'boolean', 'missing or invalid endian')
      assert(offset !== undefined && offset !== null, 'missing offset')
      assert(offset + 7 < buf.length,
          'Trying to write beyond buffer length')
      verifIEEE754(value, 1.7976931348623157E+308, -1.7976931348623157E+308)
    }
  
    var len = buf.length
    if (offset >= len)
      return
  
    ieee754.write(buf, value, offset, littleEndian, 52, 8)
  }
  
  Buffer.prototype.writeDoubleLE = function (value, offset, noAssert) {
    _writeDouble(this, value, offset, true, noAssert)
  }
  
  Buffer.prototype.writeDoubleBE = function (value, offset, noAssert) {
    _writeDouble(this, value, offset, false, noAssert)
  }
  
  // fill(value, start=0, end=buffer.length)
  Buffer.prototype.fill = function (value, start, end) {
    if (!value) value = 0
    if (!start) start = 0
    if (!end) end = this.length
  
    if (typeof value === 'string') {
      value = value.charCodeAt(0)
    }
  
    assert(typeof value === 'number' && !isNaN(value), 'value is not a number')
    assert(end >= start, 'end < start')
  
    // Fill 0 bytes; we're done
    if (end === start) return
    if (this.length === 0) return
  
    assert(start >= 0 && start < this.length, 'start out of bounds')
    assert(end >= 0 && end <= this.length, 'end out of bounds')
  
    for (var i = start; i < end; i++) {
      this[i] = value
    }
  }
  
  Buffer.prototype.inspect = function () {
    var out = []
    var len = this.length
    for (var i = 0; i < len; i++) {
      out[i] = toHex(this[i])
      if (i === exports.INSPECT_MAX_BYTES) {
        out[i + 1] = '...'
        break
      }
    }
    return '<Buffer ' + out.join(' ') + '>'
  }
  
  /**
   * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
   * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
   */
  Buffer.prototype.toArrayBuffer = function () {
    if (typeof Uint8Array !== 'undefined') {
      if (Buffer._useTypedArrays) {
        return (new Buffer(this)).buffer
      } else {
        var buf = new Uint8Array(this.length)
        for (var i = 0, len = buf.length; i < len; i += 1)
          buf[i] = this[i]
        return buf.buffer
      }
    } else {
      throw new Error('Buffer.toArrayBuffer not supported in this browser')
    }
  }
  
  // HELPER FUNCTIONS
  // ================
  
  function stringtrim (str) {
    if (str.trim) return str.trim()
    return str.replace(/^\s+|\s+$/g, '')
  }
  
  var BP = Buffer.prototype
  
  /**
   * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
   */
  Buffer._augment = function (arr) {
    arr._isBuffer = true
  
    // save reference to original Uint8Array get/set methods before overwriting
    arr._get = arr.get
    arr._set = arr.set
  
    // deprecated, will be removed in node 0.13+
    arr.get = BP.get
    arr.set = BP.set
  
    arr.write = BP.write
    arr.toString = BP.toString
    arr.toLocaleString = BP.toString
    arr.toJSON = BP.toJSON
    arr.copy = BP.copy
    arr.slice = BP.slice
    arr.readUInt8 = BP.readUInt8
    arr.readUInt16LE = BP.readUInt16LE
    arr.readUInt16BE = BP.readUInt16BE
    arr.readUInt32LE = BP.readUInt32LE
    arr.readUInt32BE = BP.readUInt32BE
    arr.readInt8 = BP.readInt8
    arr.readInt16LE = BP.readInt16LE
    arr.readInt16BE = BP.readInt16BE
    arr.readInt32LE = BP.readInt32LE
    arr.readInt32BE = BP.readInt32BE
    arr.readFloatLE = BP.readFloatLE
    arr.readFloatBE = BP.readFloatBE
    arr.readDoubleLE = BP.readDoubleLE
    arr.readDoubleBE = BP.readDoubleBE
    arr.writeUInt8 = BP.writeUInt8
    arr.writeUInt16LE = BP.writeUInt16LE
    arr.writeUInt16BE = BP.writeUInt16BE
    arr.writeUInt32LE = BP.writeUInt32LE
    arr.writeUInt32BE = BP.writeUInt32BE
    arr.writeInt8 = BP.writeInt8
    arr.writeInt16LE = BP.writeInt16LE
    arr.writeInt16BE = BP.writeInt16BE
    arr.writeInt32LE = BP.writeInt32LE
    arr.writeInt32BE = BP.writeInt32BE
    arr.writeFloatLE = BP.writeFloatLE
    arr.writeFloatBE = BP.writeFloatBE
    arr.writeDoubleLE = BP.writeDoubleLE
    arr.writeDoubleBE = BP.writeDoubleBE
    arr.fill = BP.fill
    arr.inspect = BP.inspect
    arr.toArrayBuffer = BP.toArrayBuffer
  
    return arr
  }
  
  // slice(start, end)
  function clamp (index, len, defaultValue) {
    if (typeof index !== 'number') return defaultValue
    index = ~~index;  // Coerce to integer.
    if (index >= len) return len
    if (index >= 0) return index
    index += len
    if (index >= 0) return index
    return 0
  }
  
  function coerce (length) {
    // Coerce length to a number (possibly NaN), round up
    // in case it's fractional (e.g. 123.456) then do a
    // double negate to coerce a NaN to 0. Easy, right?
    length = ~~Math.ceil(+length)
    return length < 0 ? 0 : length
  }
  
  function isArray (subject) {
    return (Array.isArray || function (subject) {
      return Object.prototype.toString.call(subject) === '[object Array]'
    })(subject)
  }
  
  function isArrayish (subject) {
    return isArray(subject) || Buffer.isBuffer(subject) ||
        subject && typeof subject === 'object' &&
        typeof subject.length === 'number'
  }
  
  function toHex (n) {
    if (n < 16) return '0' + n.toString(16)
    return n.toString(16)
  }
  
  function utf8ToBytes (str) {
    var byteArray = []
    for (var i = 0; i < str.length; i++) {
      var b = str.charCodeAt(i)
      if (b <= 0x7F)
        byteArray.push(str.charCodeAt(i))
      else {
        var start = i
        if (b >= 0xD800 && b <= 0xDFFF) i++
        var h = encodeURIComponent(str.slice(start, i+1)).substr(1).split('%')
        for (var j = 0; j < h.length; j++)
          byteArray.push(parseInt(h[j], 16))
      }
    }
    return byteArray
  }
  
  function asciiToBytes (str) {
    var byteArray = []
    for (var i = 0; i < str.length; i++) {
      // Node's code seems to be doing this and not & 0x7F..
      byteArray.push(str.charCodeAt(i) & 0xFF)
    }
    return byteArray
  }
  
  function utf16leToBytes (str) {
    var c, hi, lo
    var byteArray = []
    for (var i = 0; i < str.length; i++) {
      c = str.charCodeAt(i)
      hi = c >> 8
      lo = c % 256
      byteArray.push(lo)
      byteArray.push(hi)
    }
  
    return byteArray
  }
  
  function base64ToBytes (str) {
    return base64.toByteArray(str)
  }
  
  function blitBuffer (src, dst, offset, length) {
    var pos
    for (var i = 0; i < length; i++) {
      if ((i + offset >= dst.length) || (i >= src.length))
        break
      dst[i + offset] = src[i]
    }
    return i
  }
  
  function decodeUtf8Char (str) {
    try {
      return decodeURIComponent(str)
    } catch (err) {
      return String.fromCharCode(0xFFFD) // UTF 8 invalid char
    }
  }
  
  /*
   * We have to make sure that the value is a valid integer. This means that it
   * is non-negative. It has no fractional component and that it does not
   * exceed the maximum allowed value.
   */
  function verifuint (value, max) {
    assert(typeof value === 'number', 'cannot write a non-number as a number')
    assert(value >= 0, 'specified a negative value for writing an unsigned value')
    assert(value <= max, 'value is larger than maximum value for type')
    assert(Math.floor(value) === value, 'value has a fractional component')
  }
  
  function verifsint (value, max, min) {
    assert(typeof value === 'number', 'cannot write a non-number as a number')
    assert(value <= max, 'value larger than maximum allowed value')
    assert(value >= min, 'value smaller than minimum allowed value')
    assert(Math.floor(value) === value, 'value has a fractional component')
  }
  
  function verifIEEE754 (value, max, min) {
    assert(typeof value === 'number', 'cannot write a non-number as a number')
    assert(value <= max, 'value larger than maximum allowed value')
    assert(value >= min, 'value smaller than minimum allowed value')
  }
  
  function assert (test, message) {
    if (!test) throw new Error(message || 'Failed assertion')
  }
  
  },{"base64-js":3,"ieee754":15}],5:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  function EventEmitter() {
    this._events = this._events || {};
    this._maxListeners = this._maxListeners || undefined;
  }
  module.exports = EventEmitter;
  
  // Backwards-compat with node 0.10.x
  EventEmitter.EventEmitter = EventEmitter;
  
  EventEmitter.prototype._events = undefined;
  EventEmitter.prototype._maxListeners = undefined;
  
  // By default EventEmitters will print a warning if more than 10 listeners are
  // added to it. This is a useful default which helps finding memory leaks.
  EventEmitter.defaultMaxListeners = 10;
  
  // Obviously not all Emitters should be limited to 10. This function allows
  // that to be increased. Set to zero for unlimited.
  EventEmitter.prototype.setMaxListeners = function(n) {
    if (!isNumber(n) || n < 0 || isNaN(n))
      throw TypeError('n must be a positive number');
    this._maxListeners = n;
    return this;
  };
  
  EventEmitter.prototype.emit = function(type) {
    var er, handler, len, args, i, listeners;
  
    if (!this._events)
      this._events = {};
  
    // If there is no 'error' event listener then throw.
    if (type === 'error') {
      if (!this._events.error ||
          (isObject(this._events.error) && !this._events.error.length)) {
        er = arguments[1];
        if (er instanceof Error) {
          throw er; // Unhandled 'error' event
        }
        throw TypeError('Uncaught, unspecified "error" event.');
      }
    }
  
    handler = this._events[type];
  
    if (isUndefined(handler))
      return false;
  
    if (isFunction(handler)) {
      switch (arguments.length) {
        // fast cases
        case 1:
          handler.call(this);
          break;
        case 2:
          handler.call(this, arguments[1]);
          break;
        case 3:
          handler.call(this, arguments[1], arguments[2]);
          break;
        // slower
        default:
          len = arguments.length;
          args = new Array(len - 1);
          for (i = 1; i < len; i++)
            args[i - 1] = arguments[i];
          handler.apply(this, args);
      }
    } else if (isObject(handler)) {
      len = arguments.length;
      args = new Array(len - 1);
      for (i = 1; i < len; i++)
        args[i - 1] = arguments[i];
  
      listeners = handler.slice();
      len = listeners.length;
      for (i = 0; i < len; i++)
        listeners[i].apply(this, args);
    }
  
    return true;
  };
  
  EventEmitter.prototype.addListener = function(type, listener) {
    var m;
  
    if (!isFunction(listener))
      throw TypeError('listener must be a function');
  
    if (!this._events)
      this._events = {};
  
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (this._events.newListener)
      this.emit('newListener', type,
                isFunction(listener.listener) ?
                listener.listener : listener);
  
    if (!this._events[type])
      // Optimize the case of one listener. Don't need the extra array object.
      this._events[type] = listener;
    else if (isObject(this._events[type]))
      // If we've already got an array, just append.
      this._events[type].push(listener);
    else
      // Adding the second element, need to change to array.
      this._events[type] = [this._events[type], listener];
  
    // Check for listener leak
    if (isObject(this._events[type]) && !this._events[type].warned) {
      var m;
      if (!isUndefined(this._maxListeners)) {
        m = this._maxListeners;
      } else {
        m = EventEmitter.defaultMaxListeners;
      }
  
      if (m && m > 0 && this._events[type].length > m) {
        this._events[type].warned = true;
        console.error('(node) warning: possible EventEmitter memory ' +
                      'leak detected. %d listeners added. ' +
                      'Use emitter.setMaxListeners() to increase limit.',
                      this._events[type].length);
        if (typeof console.trace === 'function') {
          // not supported in IE 10
          console.trace();
        }
      }
    }
  
    return this;
  };
  
  EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  
  EventEmitter.prototype.once = function(type, listener) {
    if (!isFunction(listener))
      throw TypeError('listener must be a function');
  
    var fired = false;
  
    function g() {
      this.removeListener(type, g);
  
      if (!fired) {
        fired = true;
        listener.apply(this, arguments);
      }
    }
  
    g.listener = listener;
    this.on(type, g);
  
    return this;
  };
  
  // emits a 'removeListener' event iff the listener was removed
  EventEmitter.prototype.removeListener = function(type, listener) {
    var list, position, length, i;
  
    if (!isFunction(listener))
      throw TypeError('listener must be a function');
  
    if (!this._events || !this._events[type])
      return this;
  
    list = this._events[type];
    length = list.length;
    position = -1;
  
    if (list === listener ||
        (isFunction(list.listener) && list.listener === listener)) {
      delete this._events[type];
      if (this._events.removeListener)
        this.emit('removeListener', type, listener);
  
    } else if (isObject(list)) {
      for (i = length; i-- > 0;) {
        if (list[i] === listener ||
            (list[i].listener && list[i].listener === listener)) {
          position = i;
          break;
        }
      }
  
      if (position < 0)
        return this;
  
      if (list.length === 1) {
        list.length = 0;
        delete this._events[type];
      } else {
        list.splice(position, 1);
      }
  
      if (this._events.removeListener)
        this.emit('removeListener', type, listener);
    }
  
    return this;
  };
  
  EventEmitter.prototype.removeAllListeners = function(type) {
    var key, listeners;
  
    if (!this._events)
      return this;
  
    // not listening for removeListener, no need to emit
    if (!this._events.removeListener) {
      if (arguments.length === 0)
        this._events = {};
      else if (this._events[type])
        delete this._events[type];
      return this;
    }
  
    // emit removeListener for all listeners on all events
    if (arguments.length === 0) {
      for (key in this._events) {
        if (key === 'removeListener') continue;
        this.removeAllListeners(key);
      }
      this.removeAllListeners('removeListener');
      this._events = {};
      return this;
    }
  
    listeners = this._events[type];
  
    if (isFunction(listeners)) {
      this.removeListener(type, listeners);
    } else {
      // LIFO order
      while (listeners.length)
        this.removeListener(type, listeners[listeners.length - 1]);
    }
    delete this._events[type];
  
    return this;
  };
  
  EventEmitter.prototype.listeners = function(type) {
    var ret;
    if (!this._events || !this._events[type])
      ret = [];
    else if (isFunction(this._events[type]))
      ret = [this._events[type]];
    else
      ret = this._events[type].slice();
    return ret;
  };
  
  EventEmitter.listenerCount = function(emitter, type) {
    var ret;
    if (!emitter._events || !emitter._events[type])
      ret = 0;
    else if (isFunction(emitter._events[type]))
      ret = 1;
    else
      ret = emitter._events[type].length;
    return ret;
  };
  
  function isFunction(arg) {
    return typeof arg === 'function';
  }
  
  function isNumber(arg) {
    return typeof arg === 'number';
  }
  
  function isObject(arg) {
    return typeof arg === 'object' && arg !== null;
  }
  
  function isUndefined(arg) {
    return arg === void 0;
  }
  
  },{}],6:[function(require,module,exports){
  // shim for using process in browser
  
  var process = module.exports = {};
  
  process.nextTick = (function () {
      var canSetImmediate = typeof window !== 'undefined'
      && window.setImmediate;
      var canPost = typeof window !== 'undefined'
      && window.postMessage && window.addEventListener
      ;
  
      if (canSetImmediate) {
          return function (f) { return window.setImmediate(f) };
      }
  
      if (canPost) {
          var queue = [];
          window.addEventListener('message', function (ev) {
              var source = ev.source;
              if ((source === window || source === null) && ev.data === 'process-tick') {
                  ev.stopPropagation();
                  if (queue.length > 0) {
                      var fn = queue.shift();
                      fn();
                  }
              }
          }, true);
  
          return function nextTick(fn) {
              queue.push(fn);
              window.postMessage('process-tick', '*');
          };
      }
  
      return function nextTick(fn) {
          setTimeout(fn, 0);
      };
  })();
  
  process.title = 'browser';
  process.browser = true;
  process.env = {};
  process.argv = [];
  
  function noop() {}
  
  process.on = noop;
  process.addListener = noop;
  process.once = noop;
  process.off = noop;
  process.removeListener = noop;
  process.removeAllListeners = noop;
  process.emit = noop;
  
  process.binding = function (name) {
      throw new Error('process.binding is not supported');
  }
  
  // TODO(shtylman)
  process.cwd = function () { return '/' };
  process.chdir = function (dir) {
      throw new Error('process.chdir is not supported');
  };
  
  },{}],7:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // a duplex stream is just a stream that is both readable and writable.
  // Since JS doesn't have multiple prototypal inheritance, this class
  // prototypally inherits from Readable, and then parasitically from
  // Writable.
  
  module.exports = Duplex;
  var inherits = require('inherits');
  var setImmediate = require('process/browser.js').nextTick;
  var Readable = require('./readable.js');
  var Writable = require('./writable.js');
  
  inherits(Duplex, Readable);
  
  Duplex.prototype.write = Writable.prototype.write;
  Duplex.prototype.end = Writable.prototype.end;
  Duplex.prototype._write = Writable.prototype._write;
  
  function Duplex(options) {
    if (!(this instanceof Duplex))
      return new Duplex(options);
  
    Readable.call(this, options);
    Writable.call(this, options);
  
    if (options && options.readable === false)
      this.readable = false;
  
    if (options && options.writable === false)
      this.writable = false;
  
    this.allowHalfOpen = true;
    if (options && options.allowHalfOpen === false)
      this.allowHalfOpen = false;
  
    this.once('end', onend);
  }
  
  // the no-half-open enforcer
  function onend() {
    // if we allow half-open state, or if the writable side ended,
    // then we're ok.
    if (this.allowHalfOpen || this._writableState.ended)
      return;
  
    // no more data can be written.
    // But allow more writes to happen in this tick.
    var self = this;
    setImmediate(function () {
      self.end();
    });
  }
  
  },{"./readable.js":11,"./writable.js":13,"inherits":16,"process/browser.js":9}],8:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  module.exports = Stream;
  
  var EE = require('events').EventEmitter;
  var inherits = require('inherits');
  
  inherits(Stream, EE);
  Stream.Readable = require('./readable.js');
  Stream.Writable = require('./writable.js');
  Stream.Duplex = require('./duplex.js');
  Stream.Transform = require('./transform.js');
  Stream.PassThrough = require('./passthrough.js');
  
  // Backwards-compat with node 0.4.x
  Stream.Stream = Stream;
  
  
  
  // old-style streams.  Note that the pipe method (the only relevant
  // part of this class) is overridden in the Readable class.
  
  function Stream() {
    EE.call(this);
  }
  
  Stream.prototype.pipe = function(dest, options) {
    var source = this;
  
    function ondata(chunk) {
      if (dest.writable) {
        if (false === dest.write(chunk) && source.pause) {
          source.pause();
        }
      }
    }
  
    source.on('data', ondata);
  
    function ondrain() {
      if (source.readable && source.resume) {
        source.resume();
      }
    }
  
    dest.on('drain', ondrain);
  
    // If the 'end' option is not supplied, dest.end() will be called when
    // source gets the 'end' or 'close' events.  Only dest.end() once.
    if (!dest._isStdio && (!options || options.end !== false)) {
      source.on('end', onend);
      source.on('close', onclose);
    }
  
    var didOnEnd = false;
    function onend() {
      if (didOnEnd) return;
      didOnEnd = true;
  
      dest.end();
    }
  
  
    function onclose() {
      if (didOnEnd) return;
      didOnEnd = true;
  
      if (typeof dest.destroy === 'function') dest.destroy();
    }
  
    // don't leave dangling pipes when there are errors.
    function onerror(er) {
      cleanup();
      if (EE.listenerCount(this, 'error') === 0) {
        throw er; // Unhandled stream error in pipe.
      }
    }
  
    source.on('error', onerror);
    dest.on('error', onerror);
  
    // remove all the event listeners that were added.
    function cleanup() {
      source.removeListener('data', ondata);
      dest.removeListener('drain', ondrain);
  
      source.removeListener('end', onend);
      source.removeListener('close', onclose);
  
      source.removeListener('error', onerror);
      dest.removeListener('error', onerror);
  
      source.removeListener('end', cleanup);
      source.removeListener('close', cleanup);
  
      dest.removeListener('close', cleanup);
    }
  
    source.on('end', cleanup);
    source.on('close', cleanup);
  
    dest.on('close', cleanup);
  
    dest.emit('pipe', source);
  
    // Allow for unix-like usage: A.pipe(B).pipe(C)
    return dest;
  };
  
  },{"./duplex.js":7,"./passthrough.js":10,"./readable.js":11,"./transform.js":12,"./writable.js":13,"events":5,"inherits":16}],9:[function(require,module,exports){
  // shim for using process in browser
  
  var process = module.exports = {};
  
  process.nextTick = (function () {
      var canSetImmediate = typeof window !== 'undefined'
      && window.setImmediate;
      var canPost = typeof window !== 'undefined'
      && window.postMessage && window.addEventListener
      ;
  
      if (canSetImmediate) {
          return function (f) { return window.setImmediate(f) };
      }
  
      if (canPost) {
          var queue = [];
          window.addEventListener('message', function (ev) {
              var source = ev.source;
              if ((source === window || source === null) && ev.data === 'process-tick') {
                  ev.stopPropagation();
                  if (queue.length > 0) {
                      var fn = queue.shift();
                      fn();
                  }
              }
          }, true);
  
          return function nextTick(fn) {
              queue.push(fn);
              window.postMessage('process-tick', '*');
          };
      }
  
      return function nextTick(fn) {
          setTimeout(fn, 0);
      };
  })();
  
  process.title = 'browser';
  process.browser = true;
  process.env = {};
  process.argv = [];
  
  process.binding = function (name) {
      throw new Error('process.binding is not supported');
  }
  
  // TODO(shtylman)
  process.cwd = function () { return '/' };
  process.chdir = function (dir) {
      throw new Error('process.chdir is not supported');
  };
  
  },{}],10:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // a passthrough stream.
  // basically just the most minimal sort of Transform stream.
  // Every written chunk gets output as-is.
  
  module.exports = PassThrough;
  
  var Transform = require('./transform.js');
  var inherits = require('inherits');
  inherits(PassThrough, Transform);
  
  function PassThrough(options) {
    if (!(this instanceof PassThrough))
      return new PassThrough(options);
  
    Transform.call(this, options);
  }
  
  PassThrough.prototype._transform = function(chunk, encoding, cb) {
    cb(null, chunk);
  };
  
  },{"./transform.js":12,"inherits":16}],11:[function(require,module,exports){
  (function (process){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  module.exports = Readable;
  Readable.ReadableState = ReadableState;
  
  var EE = require('events').EventEmitter;
  var Stream = require('./index.js');
  var Buffer = require('buffer').Buffer;
  var setImmediate = require('process/browser.js').nextTick;
  var StringDecoder;
  
  var inherits = require('inherits');
  inherits(Readable, Stream);
  
  function ReadableState(options, stream) {
    options = options || {};
  
    // the point at which it stops calling _read() to fill the buffer
    // Note: 0 is a valid value, means "don't call _read preemptively ever"
    var hwm = options.highWaterMark;
    this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024;
  
    // cast to ints.
    this.highWaterMark = ~~this.highWaterMark;
  
    this.buffer = [];
    this.length = 0;
    this.pipes = null;
    this.pipesCount = 0;
    this.flowing = false;
    this.ended = false;
    this.endEmitted = false;
    this.reading = false;
  
    // In streams that never have any data, and do push(null) right away,
    // the consumer can miss the 'end' event if they do some I/O before
    // consuming the stream.  So, we don't emit('end') until some reading
    // happens.
    this.calledRead = false;
  
    // a flag to be able to tell if the onwrite cb is called immediately,
    // or on a later tick.  We set this to true at first, becuase any
    // actions that shouldn't happen until "later" should generally also
    // not happen before the first write call.
    this.sync = true;
  
    // whenever we return null, then we set a flag to say
    // that we're awaiting a 'readable' event emission.
    this.needReadable = false;
    this.emittedReadable = false;
    this.readableListening = false;
  
  
    // object stream flag. Used to make read(n) ignore n and to
    // make all the buffer merging and length checks go away
    this.objectMode = !!options.objectMode;
  
    // Crypto is kind of old and crusty.  Historically, its default string
    // encoding is 'binary' so we have to make this configurable.
    // Everything else in the universe uses 'utf8', though.
    this.defaultEncoding = options.defaultEncoding || 'utf8';
  
    // when piping, we only care about 'readable' events that happen
    // after read()ing all the bytes and not getting any pushback.
    this.ranOut = false;
  
    // the number of writers that are awaiting a drain event in .pipe()s
    this.awaitDrain = 0;
  
    // if true, a maybeReadMore has been scheduled
    this.readingMore = false;
  
    this.decoder = null;
    this.encoding = null;
    if (options.encoding) {
      if (!StringDecoder)
        StringDecoder = require('string_decoder').StringDecoder;
      this.decoder = new StringDecoder(options.encoding);
      this.encoding = options.encoding;
    }
  }
  
  function Readable(options) {
    if (!(this instanceof Readable))
      return new Readable(options);
  
    this._readableState = new ReadableState(options, this);
  
    // legacy
    this.readable = true;
  
    Stream.call(this);
  }
  
  // Manually shove something into the read() buffer.
  // This returns true if the highWaterMark has not been hit yet,
  // similar to how Writable.write() returns true if you should
  // write() some more.
  Readable.prototype.push = function(chunk, encoding) {
    var state = this._readableState;
  
    if (typeof chunk === 'string' && !state.objectMode) {
      encoding = encoding || state.defaultEncoding;
      if (encoding !== state.encoding) {
        chunk = new Buffer(chunk, encoding);
        encoding = '';
      }
    }
  
    return readableAddChunk(this, state, chunk, encoding, false);
  };
  
  // Unshift should *always* be something directly out of read()
  Readable.prototype.unshift = function(chunk) {
    var state = this._readableState;
    return readableAddChunk(this, state, chunk, '', true);
  };
  
  function readableAddChunk(stream, state, chunk, encoding, addToFront) {
    var er = chunkInvalid(state, chunk);
    if (er) {
      stream.emit('error', er);
    } else if (chunk === null || chunk === undefined) {
      state.reading = false;
      if (!state.ended)
        onEofChunk(stream, state);
    } else if (state.objectMode || chunk && chunk.length > 0) {
      if (state.ended && !addToFront) {
        var e = new Error('stream.push() after EOF');
        stream.emit('error', e);
      } else if (state.endEmitted && addToFront) {
        var e = new Error('stream.unshift() after end event');
        stream.emit('error', e);
      } else {
        if (state.decoder && !addToFront && !encoding)
          chunk = state.decoder.write(chunk);
  
        // update the buffer info.
        state.length += state.objectMode ? 1 : chunk.length;
        if (addToFront) {
          state.buffer.unshift(chunk);
        } else {
          state.reading = false;
          state.buffer.push(chunk);
        }
  
        if (state.needReadable)
          emitReadable(stream);
  
        maybeReadMore(stream, state);
      }
    } else if (!addToFront) {
      state.reading = false;
    }
  
    return needMoreData(state);
  }
  
  
  
  // if it's past the high water mark, we can push in some more.
  // Also, if we have no data yet, we can stand some
  // more bytes.  This is to work around cases where hwm=0,
  // such as the repl.  Also, if the push() triggered a
  // readable event, and the user called read(largeNumber) such that
  // needReadable was set, then we ought to push more, so that another
  // 'readable' event will be triggered.
  function needMoreData(state) {
    return !state.ended &&
           (state.needReadable ||
            state.length < state.highWaterMark ||
            state.length === 0);
  }
  
  // backwards compatibility.
  Readable.prototype.setEncoding = function(enc) {
    if (!StringDecoder)
      StringDecoder = require('string_decoder').StringDecoder;
    this._readableState.decoder = new StringDecoder(enc);
    this._readableState.encoding = enc;
  };
  
  // Don't raise the hwm > 128MB
  var MAX_HWM = 0x800000;
  function roundUpToNextPowerOf2(n) {
    if (n >= MAX_HWM) {
      n = MAX_HWM;
    } else {
      // Get the next highest power of 2
      n--;
      for (var p = 1; p < 32; p <<= 1) n |= n >> p;
      n++;
    }
    return n;
  }
  
  function howMuchToRead(n, state) {
    if (state.length === 0 && state.ended)
      return 0;
  
    if (state.objectMode)
      return n === 0 ? 0 : 1;
  
    if (isNaN(n) || n === null) {
      // only flow one buffer at a time
      if (state.flowing && state.buffer.length)
        return state.buffer[0].length;
      else
        return state.length;
    }
  
    if (n <= 0)
      return 0;
  
    // If we're asking for more than the target buffer level,
    // then raise the water mark.  Bump up to the next highest
    // power of 2, to prevent increasing it excessively in tiny
    // amounts.
    if (n > state.highWaterMark)
      state.highWaterMark = roundUpToNextPowerOf2(n);
  
    // don't have that much.  return null, unless we've ended.
    if (n > state.length) {
      if (!state.ended) {
        state.needReadable = true;
        return 0;
      } else
        return state.length;
    }
  
    return n;
  }
  
  // you can override either this method, or the async _read(n) below.
  Readable.prototype.read = function(n) {
    var state = this._readableState;
    state.calledRead = true;
    var nOrig = n;
  
    if (typeof n !== 'number' || n > 0)
      state.emittedReadable = false;
  
    // if we're doing read(0) to trigger a readable event, but we
    // already have a bunch of data in the buffer, then just trigger
    // the 'readable' event and move on.
    if (n === 0 &&
        state.needReadable &&
        (state.length >= state.highWaterMark || state.ended)) {
      emitReadable(this);
      return null;
    }
  
    n = howMuchToRead(n, state);
  
    // if we've ended, and we're now clear, then finish it up.
    if (n === 0 && state.ended) {
      if (state.length === 0)
        endReadable(this);
      return null;
    }
  
    // All the actual chunk generation logic needs to be
    // *below* the call to _read.  The reason is that in certain
    // synthetic stream cases, such as passthrough streams, _read
    // may be a completely synchronous operation which may change
    // the state of the read buffer, providing enough data when
    // before there was *not* enough.
    //
    // So, the steps are:
    // 1. Figure out what the state of things will be after we do
    // a read from the buffer.
    //
    // 2. If that resulting state will trigger a _read, then call _read.
    // Note that this may be asynchronous, or synchronous.  Yes, it is
    // deeply ugly to write APIs this way, but that still doesn't mean
    // that the Readable class should behave improperly, as streams are
    // designed to be sync/async agnostic.
    // Take note if the _read call is sync or async (ie, if the read call
    // has returned yet), so that we know whether or not it's safe to emit
    // 'readable' etc.
    //
    // 3. Actually pull the requested chunks out of the buffer and return.
  
    // if we need a readable event, then we need to do some reading.
    var doRead = state.needReadable;
  
    // if we currently have less than the highWaterMark, then also read some
    if (state.length - n <= state.highWaterMark)
      doRead = true;
  
    // however, if we've ended, then there's no point, and if we're already
    // reading, then it's unnecessary.
    if (state.ended || state.reading)
      doRead = false;
  
    if (doRead) {
      state.reading = true;
      state.sync = true;
      // if the length is currently zero, then we *need* a readable event.
      if (state.length === 0)
        state.needReadable = true;
      // call internal read method
      this._read(state.highWaterMark);
      state.sync = false;
    }
  
    // If _read called its callback synchronously, then `reading`
    // will be false, and we need to re-evaluate how much data we
    // can return to the user.
    if (doRead && !state.reading)
      n = howMuchToRead(nOrig, state);
  
    var ret;
    if (n > 0)
      ret = fromList(n, state);
    else
      ret = null;
  
    if (ret === null) {
      state.needReadable = true;
      n = 0;
    }
  
    state.length -= n;
  
    // If we have nothing in the buffer, then we want to know
    // as soon as we *do* get something into the buffer.
    if (state.length === 0 && !state.ended)
      state.needReadable = true;
  
    // If we happened to read() exactly the remaining amount in the
    // buffer, and the EOF has been seen at this point, then make sure
    // that we emit 'end' on the very next tick.
    if (state.ended && !state.endEmitted && state.length === 0)
      endReadable(this);
  
    return ret;
  };
  
  function chunkInvalid(state, chunk) {
    var er = null;
    if (!Buffer.isBuffer(chunk) &&
        'string' !== typeof chunk &&
        chunk !== null &&
        chunk !== undefined &&
        !state.objectMode &&
        !er) {
      er = new TypeError('Invalid non-string/buffer chunk');
    }
    return er;
  }
  
  
  function onEofChunk(stream, state) {
    if (state.decoder && !state.ended) {
      var chunk = state.decoder.end();
      if (chunk && chunk.length) {
        state.buffer.push(chunk);
        state.length += state.objectMode ? 1 : chunk.length;
      }
    }
    state.ended = true;
  
    // if we've ended and we have some data left, then emit
    // 'readable' now to make sure it gets picked up.
    if (state.length > 0)
      emitReadable(stream);
    else
      endReadable(stream);
  }
  
  // Don't emit readable right away in sync mode, because this can trigger
  // another read() call => stack overflow.  This way, it might trigger
  // a nextTick recursion warning, but that's not so bad.
  function emitReadable(stream) {
    var state = stream._readableState;
    state.needReadable = false;
    if (state.emittedReadable)
      return;
  
    state.emittedReadable = true;
    if (state.sync)
      setImmediate(function() {
        emitReadable_(stream);
      });
    else
      emitReadable_(stream);
  }
  
  function emitReadable_(stream) {
    stream.emit('readable');
  }
  
  
  // at this point, the user has presumably seen the 'readable' event,
  // and called read() to consume some data.  that may have triggered
  // in turn another _read(n) call, in which case reading = true if
  // it's in progress.
  // However, if we're not ended, or reading, and the length < hwm,
  // then go ahead and try to read some more preemptively.
  function maybeReadMore(stream, state) {
    if (!state.readingMore) {
      state.readingMore = true;
      setImmediate(function() {
        maybeReadMore_(stream, state);
      });
    }
  }
  
  function maybeReadMore_(stream, state) {
    var len = state.length;
    while (!state.reading && !state.flowing && !state.ended &&
           state.length < state.highWaterMark) {
      stream.read(0);
      if (len === state.length)
        // didn't get any data, stop spinning.
        break;
      else
        len = state.length;
    }
    state.readingMore = false;
  }
  
  // abstract method.  to be overridden in specific implementation classes.
  // call cb(er, data) where data is <= n in length.
  // for virtual (non-string, non-buffer) streams, "length" is somewhat
  // arbitrary, and perhaps not very meaningful.
  Readable.prototype._read = function(n) {
    this.emit('error', new Error('not implemented'));
  };
  
  Readable.prototype.pipe = function(dest, pipeOpts) {
    var src = this;
    var state = this._readableState;
  
    switch (state.pipesCount) {
      case 0:
        state.pipes = dest;
        break;
      case 1:
        state.pipes = [state.pipes, dest];
        break;
      default:
        state.pipes.push(dest);
        break;
    }
    state.pipesCount += 1;
  
    var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
                dest !== process.stdout &&
                dest !== process.stderr;
  
    var endFn = doEnd ? onend : cleanup;
    if (state.endEmitted)
      setImmediate(endFn);
    else
      src.once('end', endFn);
  
    dest.on('unpipe', onunpipe);
    function onunpipe(readable) {
      if (readable !== src) return;
      cleanup();
    }
  
    function onend() {
      dest.end();
    }
  
    // when the dest drains, it reduces the awaitDrain counter
    // on the source.  This would be more elegant with a .once()
    // handler in flow(), but adding and removing repeatedly is
    // too slow.
    var ondrain = pipeOnDrain(src);
    dest.on('drain', ondrain);
  
    function cleanup() {
      // cleanup event handlers once the pipe is broken
      dest.removeListener('close', onclose);
      dest.removeListener('finish', onfinish);
      dest.removeListener('drain', ondrain);
      dest.removeListener('error', onerror);
      dest.removeListener('unpipe', onunpipe);
      src.removeListener('end', onend);
      src.removeListener('end', cleanup);
  
      // if the reader is waiting for a drain event from this
      // specific writer, then it would cause it to never start
      // flowing again.
      // So, if this is awaiting a drain, then we just call it now.
      // If we don't know, then assume that we are waiting for one.
      if (!dest._writableState || dest._writableState.needDrain)
        ondrain();
    }
  
    // if the dest has an error, then stop piping into it.
    // however, don't suppress the throwing behavior for this.
    // check for listeners before emit removes one-time listeners.
    var errListeners = EE.listenerCount(dest, 'error');
    function onerror(er) {
      unpipe();
      if (errListeners === 0 && EE.listenerCount(dest, 'error') === 0)
        dest.emit('error', er);
    }
    dest.once('error', onerror);
  
    // Both close and finish should trigger unpipe, but only once.
    function onclose() {
      dest.removeListener('finish', onfinish);
      unpipe();
    }
    dest.once('close', onclose);
    function onfinish() {
      dest.removeListener('close', onclose);
      unpipe();
    }
    dest.once('finish', onfinish);
  
    function unpipe() {
      src.unpipe(dest);
    }
  
    // tell the dest that it's being piped to
    dest.emit('pipe', src);
  
    // start the flow if it hasn't been started already.
    if (!state.flowing) {
      // the handler that waits for readable events after all
      // the data gets sucked out in flow.
      // This would be easier to follow with a .once() handler
      // in flow(), but that is too slow.
      this.on('readable', pipeOnReadable);
  
      state.flowing = true;
      setImmediate(function() {
        flow(src);
      });
    }
  
    return dest;
  };
  
  function pipeOnDrain(src) {
    return function() {
      var dest = this;
      var state = src._readableState;
      state.awaitDrain--;
      if (state.awaitDrain === 0)
        flow(src);
    };
  }
  
  function flow(src) {
    var state = src._readableState;
    var chunk;
    state.awaitDrain = 0;
  
    function write(dest, i, list) {
      var written = dest.write(chunk);
      if (false === written) {
        state.awaitDrain++;
      }
    }
  
    while (state.pipesCount && null !== (chunk = src.read())) {
  
      if (state.pipesCount === 1)
        write(state.pipes, 0, null);
      else
        forEach(state.pipes, write);
  
      src.emit('data', chunk);
  
      // if anyone needs a drain, then we have to wait for that.
      if (state.awaitDrain > 0)
        return;
    }
  
    // if every destination was unpiped, either before entering this
    // function, or in the while loop, then stop flowing.
    //
    // NB: This is a pretty rare edge case.
    if (state.pipesCount === 0) {
      state.flowing = false;
  
      // if there were data event listeners added, then switch to old mode.
      if (EE.listenerCount(src, 'data') > 0)
        emitDataEvents(src);
      return;
    }
  
    // at this point, no one needed a drain, so we just ran out of data
    // on the next readable event, start it over again.
    state.ranOut = true;
  }
  
  function pipeOnReadable() {
    if (this._readableState.ranOut) {
      this._readableState.ranOut = false;
      flow(this);
    }
  }
  
  
  Readable.prototype.unpipe = function(dest) {
    var state = this._readableState;
  
    // if we're not piping anywhere, then do nothing.
    if (state.pipesCount === 0)
      return this;
  
    // just one destination.  most common case.
    if (state.pipesCount === 1) {
      // passed in one, but it's not the right one.
      if (dest && dest !== state.pipes)
        return this;
  
      if (!dest)
        dest = state.pipes;
  
      // got a match.
      state.pipes = null;
      state.pipesCount = 0;
      this.removeListener('readable', pipeOnReadable);
      state.flowing = false;
      if (dest)
        dest.emit('unpipe', this);
      return this;
    }
  
    // slow case. multiple pipe destinations.
  
    if (!dest) {
      // remove all.
      var dests = state.pipes;
      var len = state.pipesCount;
      state.pipes = null;
      state.pipesCount = 0;
      this.removeListener('readable', pipeOnReadable);
      state.flowing = false;
  
      for (var i = 0; i < len; i++)
        dests[i].emit('unpipe', this);
      return this;
    }
  
    // try to find the right one.
    var i = indexOf(state.pipes, dest);
    if (i === -1)
      return this;
  
    state.pipes.splice(i, 1);
    state.pipesCount -= 1;
    if (state.pipesCount === 1)
      state.pipes = state.pipes[0];
  
    dest.emit('unpipe', this);
  
    return this;
  };
  
  // set up data events if they are asked for
  // Ensure readable listeners eventually get something
  Readable.prototype.on = function(ev, fn) {
    var res = Stream.prototype.on.call(this, ev, fn);
  
    if (ev === 'data' && !this._readableState.flowing)
      emitDataEvents(this);
  
    if (ev === 'readable' && this.readable) {
      var state = this._readableState;
      if (!state.readableListening) {
        state.readableListening = true;
        state.emittedReadable = false;
        state.needReadable = true;
        if (!state.reading) {
          this.read(0);
        } else if (state.length) {
          emitReadable(this, state);
        }
      }
    }
  
    return res;
  };
  Readable.prototype.addListener = Readable.prototype.on;
  
  // pause() and resume() are remnants of the legacy readable stream API
  // If the user uses them, then switch into old mode.
  Readable.prototype.resume = function() {
    emitDataEvents(this);
    this.read(0);
    this.emit('resume');
  };
  
  Readable.prototype.pause = function() {
    emitDataEvents(this, true);
    this.emit('pause');
  };
  
  function emitDataEvents(stream, startPaused) {
    var state = stream._readableState;
  
    if (state.flowing) {
      // https://github.com/isaacs/readable-stream/issues/16
      throw new Error('Cannot switch to old mode now.');
    }
  
    var paused = startPaused || false;
    var readable = false;
  
    // convert to an old-style stream.
    stream.readable = true;
    stream.pipe = Stream.prototype.pipe;
    stream.on = stream.addListener = Stream.prototype.on;
  
    stream.on('readable', function() {
      readable = true;
  
      var c;
      while (!paused && (null !== (c = stream.read())))
        stream.emit('data', c);
  
      if (c === null) {
        readable = false;
        stream._readableState.needReadable = true;
      }
    });
  
    stream.pause = function() {
      paused = true;
      this.emit('pause');
    };
  
    stream.resume = function() {
      paused = false;
      if (readable)
        setImmediate(function() {
          stream.emit('readable');
        });
      else
        this.read(0);
      this.emit('resume');
    };
  
    // now make it start, just in case it hadn't already.
    stream.emit('readable');
  }
  
  // wrap an old-style stream as the async data source.
  // This is *not* part of the readable stream interface.
  // It is an ugly unfortunate mess of history.
  Readable.prototype.wrap = function(stream) {
    var state = this._readableState;
    var paused = false;
  
    var self = this;
    stream.on('end', function() {
      if (state.decoder && !state.ended) {
        var chunk = state.decoder.end();
        if (chunk && chunk.length)
          self.push(chunk);
      }
  
      self.push(null);
    });
  
    stream.on('data', function(chunk) {
      if (state.decoder)
        chunk = state.decoder.write(chunk);
      if (!chunk || !state.objectMode && !chunk.length)
        return;
  
      var ret = self.push(chunk);
      if (!ret) {
        paused = true;
        stream.pause();
      }
    });
  
    // proxy all the other methods.
    // important when wrapping filters and duplexes.
    for (var i in stream) {
      if (typeof stream[i] === 'function' &&
          typeof this[i] === 'undefined') {
        this[i] = function(method) { return function() {
          return stream[method].apply(stream, arguments);
        }}(i);
      }
    }
  
    // proxy certain important events.
    var events = ['error', 'close', 'destroy', 'pause', 'resume'];
    forEach(events, function(ev) {
      stream.on(ev, function (x) {
        return self.emit.apply(self, ev, x);
      });
    });
  
    // when we try to consume some more bytes, simply unpause the
    // underlying stream.
    self._read = function(n) {
      if (paused) {
        paused = false;
        stream.resume();
      }
    };
  
    return self;
  };
  
  
  
  // exposed for testing purposes only.
  Readable._fromList = fromList;
  
  // Pluck off n bytes from an array of buffers.
  // Length is the combined lengths of all the buffers in the list.
  function fromList(n, state) {
    var list = state.buffer;
    var length = state.length;
    var stringMode = !!state.decoder;
    var objectMode = !!state.objectMode;
    var ret;
  
    // nothing in the list, definitely empty.
    if (list.length === 0)
      return null;
  
    if (length === 0)
      ret = null;
    else if (objectMode)
      ret = list.shift();
    else if (!n || n >= length) {
      // read it all, truncate the array.
      if (stringMode)
        ret = list.join('');
      else
        ret = Buffer.concat(list, length);
      list.length = 0;
    } else {
      // read just some of it.
      if (n < list[0].length) {
        // just take a part of the first list item.
        // slice is the same for buffers and strings.
        var buf = list[0];
        ret = buf.slice(0, n);
        list[0] = buf.slice(n);
      } else if (n === list[0].length) {
        // first list is a perfect match
        ret = list.shift();
      } else {
        // complex case.
        // we have enough to cover it, but it spans past the first buffer.
        if (stringMode)
          ret = '';
        else
          ret = new Buffer(n);
  
        var c = 0;
        for (var i = 0, l = list.length; i < l && c < n; i++) {
          var buf = list[0];
          var cpy = Math.min(n - c, buf.length);
  
          if (stringMode)
            ret += buf.slice(0, cpy);
          else
            buf.copy(ret, c, 0, cpy);
  
          if (cpy < buf.length)
            list[0] = buf.slice(cpy);
          else
            list.shift();
  
          c += cpy;
        }
      }
    }
  
    return ret;
  }
  
  function endReadable(stream) {
    var state = stream._readableState;
  
    // If we get here before consuming all the bytes, then that is a
    // bug in node.  Should never happen.
    if (state.length > 0)
      throw new Error('endReadable called on non-empty stream');
  
    if (!state.endEmitted && state.calledRead) {
      state.ended = true;
      setImmediate(function() {
        // Check that we didn't get one last unshift.
        if (!state.endEmitted && state.length === 0) {
          state.endEmitted = true;
          stream.readable = false;
          stream.emit('end');
        }
      });
    }
  }
  
  function forEach (xs, f) {
    for (var i = 0, l = xs.length; i < l; i++) {
      f(xs[i], i);
    }
  }
  
  function indexOf (xs, x) {
    for (var i = 0, l = xs.length; i < l; i++) {
      if (xs[i] === x) return i;
    }
    return -1;
  }
  
  }).call(this,require("7YKIPe"))
  },{"./index.js":8,"7YKIPe":6,"buffer":4,"events":5,"inherits":16,"process/browser.js":9,"string_decoder":14}],12:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // a transform stream is a readable/writable stream where you do
  // something with the data.  Sometimes it's called a "filter",
  // but that's not a great name for it, since that implies a thing where
  // some bits pass through, and others are simply ignored.  (That would
  // be a valid example of a transform, of course.)
  //
  // While the output is causally related to the input, it's not a
  // necessarily symmetric or synchronous transformation.  For example,
  // a zlib stream might take multiple plain-text writes(), and then
  // emit a single compressed chunk some time in the future.
  //
  // Here's how this works:
  //
  // The Transform stream has all the aspects of the readable and writable
  // stream classes.  When you write(chunk), that calls _write(chunk,cb)
  // internally, and returns false if there's a lot of pending writes
  // buffered up.  When you call read(), that calls _read(n) until
  // there's enough pending readable data buffered up.
  //
  // In a transform stream, the written data is placed in a buffer.  When
  // _read(n) is called, it transforms the queued up data, calling the
  // buffered _write cb's as it consumes chunks.  If consuming a single
  // written chunk would result in multiple output chunks, then the first
  // outputted bit calls the readcb, and subsequent chunks just go into
  // the read buffer, and will cause it to emit 'readable' if necessary.
  //
  // This way, back-pressure is actually determined by the reading side,
  // since _read has to be called to start processing a new chunk.  However,
  // a pathological inflate type of transform can cause excessive buffering
  // here.  For example, imagine a stream where every byte of input is
  // interpreted as an integer from 0-255, and then results in that many
  // bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
  // 1kb of data being output.  In this case, you could write a very small
  // amount of input, and end up with a very large amount of output.  In
  // such a pathological inflating mechanism, there'd be no way to tell
  // the system to stop doing the transform.  A single 4MB write could
  // cause the system to run out of memory.
  //
  // However, even in such a pathological case, only a single written chunk
  // would be consumed, and then the rest would wait (un-transformed) until
  // the results of the previous transformed chunk were consumed.
  
  module.exports = Transform;
  
  var Duplex = require('./duplex.js');
  var inherits = require('inherits');
  inherits(Transform, Duplex);
  
  
  function TransformState(options, stream) {
    this.afterTransform = function(er, data) {
      return afterTransform(stream, er, data);
    };
  
    this.needTransform = false;
    this.transforming = false;
    this.writecb = null;
    this.writechunk = null;
  }
  
  function afterTransform(stream, er, data) {
    var ts = stream._transformState;
    ts.transforming = false;
  
    var cb = ts.writecb;
  
    if (!cb)
      return stream.emit('error', new Error('no writecb in Transform class'));
  
    ts.writechunk = null;
    ts.writecb = null;
  
    if (data !== null && data !== undefined)
      stream.push(data);
  
    if (cb)
      cb(er);
  
    var rs = stream._readableState;
    rs.reading = false;
    if (rs.needReadable || rs.length < rs.highWaterMark) {
      stream._read(rs.highWaterMark);
    }
  }
  
  
  function Transform(options) {
    if (!(this instanceof Transform))
      return new Transform(options);
  
    Duplex.call(this, options);
  
    var ts = this._transformState = new TransformState(options, this);
  
    // when the writable side finishes, then flush out anything remaining.
    var stream = this;
  
    // start out asking for a readable event once data is transformed.
    this._readableState.needReadable = true;
  
    // we have implemented the _read method, and done the other things
    // that Readable wants before the first _read call, so unset the
    // sync guard flag.
    this._readableState.sync = false;
  
    this.once('finish', function() {
      if ('function' === typeof this._flush)
        this._flush(function(er) {
          done(stream, er);
        });
      else
        done(stream);
    });
  }
  
  Transform.prototype.push = function(chunk, encoding) {
    this._transformState.needTransform = false;
    return Duplex.prototype.push.call(this, chunk, encoding);
  };
  
  // This is the part where you do stuff!
  // override this function in implementation classes.
  // 'chunk' is an input chunk.
  //
  // Call `push(newChunk)` to pass along transformed output
  // to the readable side.  You may call 'push' zero or more times.
  //
  // Call `cb(err)` when you are done with this chunk.  If you pass
  // an error, then that'll put the hurt on the whole operation.  If you
  // never call cb(), then you'll never get another chunk.
  Transform.prototype._transform = function(chunk, encoding, cb) {
    throw new Error('not implemented');
  };
  
  Transform.prototype._write = function(chunk, encoding, cb) {
    var ts = this._transformState;
    ts.writecb = cb;
    ts.writechunk = chunk;
    ts.writeencoding = encoding;
    if (!ts.transforming) {
      var rs = this._readableState;
      if (ts.needTransform ||
          rs.needReadable ||
          rs.length < rs.highWaterMark)
        this._read(rs.highWaterMark);
    }
  };
  
  // Doesn't matter what the args are here.
  // _transform does all the work.
  // That we got here means that the readable side wants more data.
  Transform.prototype._read = function(n) {
    var ts = this._transformState;
  
    if (ts.writechunk && ts.writecb && !ts.transforming) {
      ts.transforming = true;
      this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
    } else {
      // mark that we need a transform, so that any data that comes in
      // will get processed, now that we've asked for it.
      ts.needTransform = true;
    }
  };
  
  
  function done(stream, er) {
    if (er)
      return stream.emit('error', er);
  
    // if there's nothing in the write buffer, then that means
    // that nothing more will ever be provided
    var ws = stream._writableState;
    var rs = stream._readableState;
    var ts = stream._transformState;
  
    if (ws.length)
      throw new Error('calling transform done when ws.length != 0');
  
    if (ts.transforming)
      throw new Error('calling transform done when still transforming');
  
    return stream.push(null);
  }
  
  },{"./duplex.js":7,"inherits":16}],13:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // A bit simpler than readable streams.
  // Implement an async ._write(chunk, cb), and it'll handle all
  // the drain event emission and buffering.
  
  module.exports = Writable;
  Writable.WritableState = WritableState;
  
  var isUint8Array = typeof Uint8Array !== 'undefined'
    ? function (x) { return x instanceof Uint8Array }
    : function (x) {
      return x && x.constructor && x.constructor.name === 'Uint8Array'
    }
  ;
  var isArrayBuffer = typeof ArrayBuffer !== 'undefined'
    ? function (x) { return x instanceof ArrayBuffer }
    : function (x) {
      return x && x.constructor && x.constructor.name === 'ArrayBuffer'
    }
  ;
  
  var inherits = require('inherits');
  var Stream = require('./index.js');
  var setImmediate = require('process/browser.js').nextTick;
  var Buffer = require('buffer').Buffer;
  
  inherits(Writable, Stream);
  
  function WriteReq(chunk, encoding, cb) {
    this.chunk = chunk;
    this.encoding = encoding;
    this.callback = cb;
  }
  
  function WritableState(options, stream) {
    options = options || {};
  
    // the point at which write() starts returning false
    // Note: 0 is a valid value, means that we always return false if
    // the entire buffer is not flushed immediately on write()
    var hwm = options.highWaterMark;
    this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024;
  
    // object stream flag to indicate whether or not this stream
    // contains buffers or objects.
    this.objectMode = !!options.objectMode;
  
    // cast to ints.
    this.highWaterMark = ~~this.highWaterMark;
  
    this.needDrain = false;
    // at the start of calling end()
    this.ending = false;
    // when end() has been called, and returned
    this.ended = false;
    // when 'finish' is emitted
    this.finished = false;
  
    // should we decode strings into buffers before passing to _write?
    // this is here so that some node-core streams can optimize string
    // handling at a lower level.
    var noDecode = options.decodeStrings === false;
    this.decodeStrings = !noDecode;
  
    // Crypto is kind of old and crusty.  Historically, its default string
    // encoding is 'binary' so we have to make this configurable.
    // Everything else in the universe uses 'utf8', though.
    this.defaultEncoding = options.defaultEncoding || 'utf8';
  
    // not an actual buffer we keep track of, but a measurement
    // of how much we're waiting to get pushed to some underlying
    // socket or file.
    this.length = 0;
  
    // a flag to see when we're in the middle of a write.
    this.writing = false;
  
    // a flag to be able to tell if the onwrite cb is called immediately,
    // or on a later tick.  We set this to true at first, becuase any
    // actions that shouldn't happen until "later" should generally also
    // not happen before the first write call.
    this.sync = true;
  
    // a flag to know if we're processing previously buffered items, which
    // may call the _write() callback in the same tick, so that we don't
    // end up in an overlapped onwrite situation.
    this.bufferProcessing = false;
  
    // the callback that's passed to _write(chunk,cb)
    this.onwrite = function(er) {
      onwrite(stream, er);
    };
  
    // the callback that the user supplies to write(chunk,encoding,cb)
    this.writecb = null;
  
    // the amount that is being written when _write is called.
    this.writelen = 0;
  
    this.buffer = [];
  }
  
  function Writable(options) {
    // Writable ctor is applied to Duplexes, though they're not
    // instanceof Writable, they're instanceof Readable.
    if (!(this instanceof Writable) && !(this instanceof Stream.Duplex))
      return new Writable(options);
  
    this._writableState = new WritableState(options, this);
  
    // legacy.
    this.writable = true;
  
    Stream.call(this);
  }
  
  // Otherwise people can pipe Writable streams, which is just wrong.
  Writable.prototype.pipe = function() {
    this.emit('error', new Error('Cannot pipe. Not readable.'));
  };
  
  
  function writeAfterEnd(stream, state, cb) {
    var er = new Error('write after end');
    // TODO: defer error events consistently everywhere, not just the cb
    stream.emit('error', er);
    setImmediate(function() {
      cb(er);
    });
  }
  
  // If we get something that is not a buffer, string, null, or undefined,
  // and we're not in objectMode, then that's an error.
  // Otherwise stream chunks are all considered to be of length=1, and the
  // watermarks determine how many objects to keep in the buffer, rather than
  // how many bytes or characters.
  function validChunk(stream, state, chunk, cb) {
    var valid = true;
    if (!Buffer.isBuffer(chunk) &&
        'string' !== typeof chunk &&
        chunk !== null &&
        chunk !== undefined &&
        !state.objectMode) {
      var er = new TypeError('Invalid non-string/buffer chunk');
      stream.emit('error', er);
      setImmediate(function() {
        cb(er);
      });
      valid = false;
    }
    return valid;
  }
  
  Writable.prototype.write = function(chunk, encoding, cb) {
    var state = this._writableState;
    var ret = false;
  
    if (typeof encoding === 'function') {
      cb = encoding;
      encoding = null;
    }
  
    if (!Buffer.isBuffer(chunk) && isUint8Array(chunk))
      chunk = new Buffer(chunk);
    if (isArrayBuffer(chunk) && typeof Uint8Array !== 'undefined')
      chunk = new Buffer(new Uint8Array(chunk));
    
    if (Buffer.isBuffer(chunk))
      encoding = 'buffer';
    else if (!encoding)
      encoding = state.defaultEncoding;
  
    if (typeof cb !== 'function')
      cb = function() {};
  
    if (state.ended)
      writeAfterEnd(this, state, cb);
    else if (validChunk(this, state, chunk, cb))
      ret = writeOrBuffer(this, state, chunk, encoding, cb);
  
    return ret;
  };
  
  function decodeChunk(state, chunk, encoding) {
    if (!state.objectMode &&
        state.decodeStrings !== false &&
        typeof chunk === 'string') {
      chunk = new Buffer(chunk, encoding);
    }
    return chunk;
  }
  
  // if we're already writing something, then just put this
  // in the queue, and wait our turn.  Otherwise, call _write
  // If we return false, then we need a drain event, so set that flag.
  function writeOrBuffer(stream, state, chunk, encoding, cb) {
    chunk = decodeChunk(state, chunk, encoding);
    var len = state.objectMode ? 1 : chunk.length;
  
    state.length += len;
  
    var ret = state.length < state.highWaterMark;
    state.needDrain = !ret;
  
    if (state.writing)
      state.buffer.push(new WriteReq(chunk, encoding, cb));
    else
      doWrite(stream, state, len, chunk, encoding, cb);
  
    return ret;
  }
  
  function doWrite(stream, state, len, chunk, encoding, cb) {
    state.writelen = len;
    state.writecb = cb;
    state.writing = true;
    state.sync = true;
    stream._write(chunk, encoding, state.onwrite);
    state.sync = false;
  }
  
  function onwriteError(stream, state, sync, er, cb) {
    if (sync)
      setImmediate(function() {
        cb(er);
      });
    else
      cb(er);
  
    stream.emit('error', er);
  }
  
  function onwriteStateUpdate(state) {
    state.writing = false;
    state.writecb = null;
    state.length -= state.writelen;
    state.writelen = 0;
  }
  
  function onwrite(stream, er) {
    var state = stream._writableState;
    var sync = state.sync;
    var cb = state.writecb;
  
    onwriteStateUpdate(state);
  
    if (er)
      onwriteError(stream, state, sync, er, cb);
    else {
      // Check if we're actually ready to finish, but don't emit yet
      var finished = needFinish(stream, state);
  
      if (!finished && !state.bufferProcessing && state.buffer.length)
        clearBuffer(stream, state);
  
      if (sync) {
        setImmediate(function() {
          afterWrite(stream, state, finished, cb);
        });
      } else {
        afterWrite(stream, state, finished, cb);
      }
    }
  }
  
  function afterWrite(stream, state, finished, cb) {
    if (!finished)
      onwriteDrain(stream, state);
    cb();
    if (finished)
      finishMaybe(stream, state);
  }
  
  // Must force callback to be called on nextTick, so that we don't
  // emit 'drain' before the write() consumer gets the 'false' return
  // value, and has a chance to attach a 'drain' listener.
  function onwriteDrain(stream, state) {
    if (state.length === 0 && state.needDrain) {
      state.needDrain = false;
      stream.emit('drain');
    }
  }
  
  
  // if there's something in the buffer waiting, then process it
  function clearBuffer(stream, state) {
    state.bufferProcessing = true;
  
    for (var c = 0; c < state.buffer.length; c++) {
      var entry = state.buffer[c];
      var chunk = entry.chunk;
      var encoding = entry.encoding;
      var cb = entry.callback;
      var len = state.objectMode ? 1 : chunk.length;
  
      doWrite(stream, state, len, chunk, encoding, cb);
  
      // if we didn't call the onwrite immediately, then
      // it means that we need to wait until it does.
      // also, that means that the chunk and cb are currently
      // being processed, so move the buffer counter past them.
      if (state.writing) {
        c++;
        break;
      }
    }
  
    state.bufferProcessing = false;
    if (c < state.buffer.length)
      state.buffer = state.buffer.slice(c);
    else
      state.buffer.length = 0;
  }
  
  Writable.prototype._write = function(chunk, encoding, cb) {
    cb(new Error('not implemented'));
  };
  
  Writable.prototype.end = function(chunk, encoding, cb) {
    var state = this._writableState;
  
    if (typeof chunk === 'function') {
      cb = chunk;
      chunk = null;
      encoding = null;
    } else if (typeof encoding === 'function') {
      cb = encoding;
      encoding = null;
    }
  
    if (typeof chunk !== 'undefined' && chunk !== null)
      this.write(chunk, encoding);
  
    // ignore unnecessary end() calls.
    if (!state.ending && !state.finished)
      endWritable(this, state, cb);
  };
  
  
  function needFinish(stream, state) {
    return (state.ending &&
            state.length === 0 &&
            !state.finished &&
            !state.writing);
  }
  
  function finishMaybe(stream, state) {
    var need = needFinish(stream, state);
    if (need) {
      state.finished = true;
      stream.emit('finish');
    }
    return need;
  }
  
  function endWritable(stream, state, cb) {
    state.ending = true;
    finishMaybe(stream, state);
    if (cb) {
      if (state.finished)
        setImmediate(cb);
      else
        stream.once('finish', cb);
    }
    state.ended = true;
  }
  
  },{"./index.js":8,"buffer":4,"inherits":16,"process/browser.js":9}],14:[function(require,module,exports){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  var Buffer = require('buffer').Buffer;
  
  function assertEncoding(encoding) {
    if (encoding && !Buffer.isEncoding(encoding)) {
      throw new Error('Unknown encoding: ' + encoding);
    }
  }
  
  var StringDecoder = exports.StringDecoder = function(encoding) {
    this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
    assertEncoding(encoding);
    switch (this.encoding) {
      case 'utf8':
        // CESU-8 represents each of Surrogate Pair by 3-bytes
        this.surrogateSize = 3;
        break;
      case 'ucs2':
      case 'utf16le':
        // UTF-16 represents each of Surrogate Pair by 2-bytes
        this.surrogateSize = 2;
        this.detectIncompleteChar = utf16DetectIncompleteChar;
        break;
      case 'base64':
        // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
        this.surrogateSize = 3;
        this.detectIncompleteChar = base64DetectIncompleteChar;
        break;
      default:
        this.write = passThroughWrite;
        return;
    }
  
    this.charBuffer = new Buffer(6);
    this.charReceived = 0;
    this.charLength = 0;
  };
  
  
  StringDecoder.prototype.write = function(buffer) {
    var charStr = '';
    var offset = 0;
  
    // if our last write ended with an incomplete multibyte character
    while (this.charLength) {
      // determine how many remaining bytes this buffer has to offer for this char
      var i = (buffer.length >= this.charLength - this.charReceived) ?
                  this.charLength - this.charReceived :
                  buffer.length;
  
      // add the new bytes to the char buffer
      buffer.copy(this.charBuffer, this.charReceived, offset, i);
      this.charReceived += (i - offset);
      offset = i;
  
      if (this.charReceived < this.charLength) {
        // still not enough chars in this buffer? wait for more ...
        return '';
      }
  
      // get the character that was split
      charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);
  
      // lead surrogate (D800-DBFF) is also the incomplete character
      var charCode = charStr.charCodeAt(charStr.length - 1);
      if (charCode >= 0xD800 && charCode <= 0xDBFF) {
        this.charLength += this.surrogateSize;
        charStr = '';
        continue;
      }
      this.charReceived = this.charLength = 0;
  
      // if there are no more bytes in this buffer, just emit our char
      if (i == buffer.length) return charStr;
  
      // otherwise cut off the characters end from the beginning of this buffer
      buffer = buffer.slice(i, buffer.length);
      break;
    }
  
    var lenIncomplete = this.detectIncompleteChar(buffer);
  
    var end = buffer.length;
    if (this.charLength) {
      // buffer the incomplete character bytes we got
      buffer.copy(this.charBuffer, 0, buffer.length - lenIncomplete, end);
      this.charReceived = lenIncomplete;
      end -= lenIncomplete;
    }
  
    charStr += buffer.toString(this.encoding, 0, end);
  
    var end = charStr.length - 1;
    var charCode = charStr.charCodeAt(end);
    // lead surrogate (D800-DBFF) is also the incomplete character
    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
      var size = this.surrogateSize;
      this.charLength += size;
      this.charReceived += size;
      this.charBuffer.copy(this.charBuffer, size, 0, size);
      this.charBuffer.write(charStr.charAt(charStr.length - 1), this.encoding);
      return charStr.substring(0, end);
    }
  
    // or just emit the charStr
    return charStr;
  };
  
  StringDecoder.prototype.detectIncompleteChar = function(buffer) {
    // determine how many bytes we have to check at the end of this buffer
    var i = (buffer.length >= 3) ? 3 : buffer.length;
  
    // Figure out if one of the last i bytes of our buffer announces an
    // incomplete char.
    for (; i > 0; i--) {
      var c = buffer[buffer.length - i];
  
      // See http://en.wikipedia.org/wiki/UTF-8#Description
  
      // 110XXXXX
      if (i == 1 && c >> 5 == 0x06) {
        this.charLength = 2;
        break;
      }
  
      // 1110XXXX
      if (i <= 2 && c >> 4 == 0x0E) {
        this.charLength = 3;
        break;
      }
  
      // 11110XXX
      if (i <= 3 && c >> 3 == 0x1E) {
        this.charLength = 4;
        break;
      }
    }
  
    return i;
  };
  
  StringDecoder.prototype.end = function(buffer) {
    var res = '';
    if (buffer && buffer.length)
      res = this.write(buffer);
  
    if (this.charReceived) {
      var cr = this.charReceived;
      var buf = this.charBuffer;
      var enc = this.encoding;
      res += buf.slice(0, cr).toString(enc);
    }
  
    return res;
  };
  
  function passThroughWrite(buffer) {
    return buffer.toString(this.encoding);
  }
  
  function utf16DetectIncompleteChar(buffer) {
    var incomplete = this.charReceived = buffer.length % 2;
    this.charLength = incomplete ? 2 : 0;
    return incomplete;
  }
  
  function base64DetectIncompleteChar(buffer) {
    var incomplete = this.charReceived = buffer.length % 3;
    this.charLength = incomplete ? 3 : 0;
    return incomplete;
  }
  
  },{"buffer":4}],15:[function(require,module,exports){
  exports.read = function (buffer, offset, isLE, mLen, nBytes) {
    var e, m
    var eLen = nBytes * 8 - mLen - 1
    var eMax = (1 << eLen) - 1
    var eBias = eMax >> 1
    var nBits = -7
    var i = isLE ? (nBytes - 1) : 0
    var d = isLE ? -1 : 1
    var s = buffer[offset + i]
  
    i += d
  
    e = s & ((1 << (-nBits)) - 1)
    s >>= (-nBits)
    nBits += eLen
    for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
  
    m = e & ((1 << (-nBits)) - 1)
    e >>= (-nBits)
    nBits += mLen
    for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
  
    if (e === 0) {
      e = 1 - eBias
    } else if (e === eMax) {
      return m ? NaN : ((s ? -1 : 1) * Infinity)
    } else {
      m = m + Math.pow(2, mLen)
      e = e - eBias
    }
    return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
  }
  
  exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
    var e, m, c
    var eLen = nBytes * 8 - mLen - 1
    var eMax = (1 << eLen) - 1
    var eBias = eMax >> 1
    var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
    var i = isLE ? 0 : (nBytes - 1)
    var d = isLE ? 1 : -1
    var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
  
    value = Math.abs(value)
  
    if (isNaN(value) || value === Infinity) {
      m = isNaN(value) ? 1 : 0
      e = eMax
    } else {
      e = Math.floor(Math.log(value) / Math.LN2)
      if (value * (c = Math.pow(2, -e)) < 1) {
        e--
        c *= 2
      }
      if (e + eBias >= 1) {
        value += rt / c
      } else {
        value += rt * Math.pow(2, 1 - eBias)
      }
      if (value * c >= 2) {
        e++
        c /= 2
      }
  
      if (e + eBias >= eMax) {
        m = 0
        e = eMax
      } else if (e + eBias >= 1) {
        m = (value * c - 1) * Math.pow(2, mLen)
        e = e + eBias
      } else {
        m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
        e = 0
      }
    }
  
    for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
  
    e = (e << mLen) | m
    eLen += mLen
    for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
  
    buffer[offset + i - d] |= s * 128
  }
  
  },{}],16:[function(require,module,exports){
  if (typeof Object.create === 'function') {
    // implementation from standard node.js 'util' module
    module.exports = function inherits(ctor, superCtor) {
      ctor.super_ = superCtor
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
    };
  } else {
    // old school shim for old browsers
    module.exports = function inherits(ctor, superCtor) {
      ctor.super_ = superCtor
      var TempCtor = function () {}
      TempCtor.prototype = superCtor.prototype
      ctor.prototype = new TempCtor()
      ctor.prototype.constructor = ctor
    }
  }
  
  },{}],17:[function(require,module,exports){
  module.exports=require(16)
  },{}],18:[function(require,module,exports){
  module.exports = function isBuffer(arg) {
    return arg && typeof arg === 'object'
      && typeof arg.copy === 'function'
      && typeof arg.fill === 'function'
      && typeof arg.readUInt8 === 'function';
  }
  },{}],19:[function(require,module,exports){
  (function (process,global){
  // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  var formatRegExp = /%[sdj%]/g;
  exports.format = function(f) {
    if (!isString(f)) {
      var objects = [];
      for (var i = 0; i < arguments.length; i++) {
        objects.push(inspect(arguments[i]));
      }
      return objects.join(' ');
    }
  
    var i = 1;
    var args = arguments;
    var len = args.length;
    var str = String(f).replace(formatRegExp, function(x) {
      if (x === '%%') return '%';
      if (i >= len) return x;
      switch (x) {
        case '%s': return String(args[i++]);
        case '%d': return Number(args[i++]);
        case '%j':
          try {
            return JSON.stringify(args[i++]);
          } catch (_) {
            return '[Circular]';
          }
        default:
          return x;
      }
    });
    for (var x = args[i]; i < len; x = args[++i]) {
      if (isNull(x) || !isObject(x)) {
        str += ' ' + x;
      } else {
        str += ' ' + inspect(x);
      }
    }
    return str;
  };
  
  
  // Mark that a method should not be used.
  // Returns a modified function which warns once by default.
  // If --no-deprecation is set, then it is a no-op.
  exports.deprecate = function(fn, msg) {
    // Allow for deprecating things in the process of starting up.
    if (isUndefined(global.process)) {
      return function() {
        return exports.deprecate(fn, msg).apply(this, arguments);
      };
    }
  
    if (process.noDeprecation === true) {
      return fn;
    }
  
    var warned = false;
    function deprecated() {
      if (!warned) {
        if (process.throwDeprecation) {
          throw new Error(msg);
        } else if (process.traceDeprecation) {
          console.trace(msg);
        } else {
          console.error(msg);
        }
        warned = true;
      }
      return fn.apply(this, arguments);
    }
  
    return deprecated;
  };
  
  
  var debugs = {};
  var debugEnviron;
  exports.debuglog = function(set) {
    if (isUndefined(debugEnviron))
      debugEnviron = process.env.NODE_DEBUG || '';
    set = set.toUpperCase();
    if (!debugs[set]) {
      if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
        var pid = process.pid;
        debugs[set] = function() {
          var msg = exports.format.apply(exports, arguments);
          console.error('%s %d: %s', set, pid, msg);
        };
      } else {
        debugs[set] = function() {};
      }
    }
    return debugs[set];
  };
  
  
  /**
   * Echos the value of a value. Trys to print the value out
   * in the best way possible given the different types.
   *
   * @param {Object} obj The object to print out.
   * @param {Object} opts Optional options object that alters the output.
   */
  /* legacy: obj, showHidden, depth, colors*/
  function inspect(obj, opts) {
    // default options
    var ctx = {
      seen: [],
      stylize: stylizeNoColor
    };
    // legacy...
    if (arguments.length >= 3) ctx.depth = arguments[2];
    if (arguments.length >= 4) ctx.colors = arguments[3];
    if (isBoolean(opts)) {
      // legacy...
      ctx.showHidden = opts;
    } else if (opts) {
      // got an "options" object
      exports._extend(ctx, opts);
    }
    // set default options
    if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
    if (isUndefined(ctx.depth)) ctx.depth = 2;
    if (isUndefined(ctx.colors)) ctx.colors = false;
    if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
    if (ctx.colors) ctx.stylize = stylizeWithColor;
    return formatValue(ctx, obj, ctx.depth);
  }
  exports.inspect = inspect;
  
  
  // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
  inspect.colors = {
    'bold' : [1, 22],
    'italic' : [3, 23],
    'underline' : [4, 24],
    'inverse' : [7, 27],
    'white' : [37, 39],
    'grey' : [90, 39],
    'black' : [30, 39],
    'blue' : [34, 39],
    'cyan' : [36, 39],
    'green' : [32, 39],
    'magenta' : [35, 39],
    'red' : [31, 39],
    'yellow' : [33, 39]
  };
  
  // Don't use 'blue' not visible on cmd.exe
  inspect.styles = {
    'special': 'cyan',
    'number': 'yellow',
    'boolean': 'yellow',
    'undefined': 'grey',
    'null': 'bold',
    'string': 'green',
    'date': 'magenta',
    // "name": intentionally not styling
    'regexp': 'red'
  };
  
  
  function stylizeWithColor(str, styleType) {
    var style = inspect.styles[styleType];
  
    if (style) {
      return '\u001b[' + inspect.colors[style][0] + 'm' + str +
             '\u001b[' + inspect.colors[style][1] + 'm';
    } else {
      return str;
    }
  }
  
  
  function stylizeNoColor(str, styleType) {
    return str;
  }
  
  
  function arrayToHash(array) {
    var hash = {};
  
    array.forEach(function(val, idx) {
      hash[val] = true;
    });
  
    return hash;
  }
  
  
  function formatValue(ctx, value, recurseTimes) {
    // Provide a hook for user-specified inspect functions.
    // Check that value is an object with an inspect function on it
    if (ctx.customInspect &&
        value &&
        isFunction(value.inspect) &&
        // Filter out the util module, it's inspect function is special
        value.inspect !== exports.inspect &&
        // Also filter out any prototype objects using the circular check.
        !(value.constructor && value.constructor.prototype === value)) {
      var ret = value.inspect(recurseTimes, ctx);
      if (!isString(ret)) {
        ret = formatValue(ctx, ret, recurseTimes);
      }
      return ret;
    }
  
    // Primitive types cannot have properties
    var primitive = formatPrimitive(ctx, value);
    if (primitive) {
      return primitive;
    }
  
    // Look up the keys of the object.
    var keys = Object.keys(value);
    var visibleKeys = arrayToHash(keys);
  
    if (ctx.showHidden) {
      keys = Object.getOwnPropertyNames(value);
    }
  
    // IE doesn't make error fields non-enumerable
    // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
    if (isError(value)
        && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
      return formatError(value);
    }
  
    // Some type of object without properties can be shortcutted.
    if (keys.length === 0) {
      if (isFunction(value)) {
        var name = value.name ? ': ' + value.name : '';
        return ctx.stylize('[Function' + name + ']', 'special');
      }
      if (isRegExp(value)) {
        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
      }
      if (isDate(value)) {
        return ctx.stylize(Date.prototype.toString.call(value), 'date');
      }
      if (isError(value)) {
        return formatError(value);
      }
    }
  
    var base = '', array = false, braces = ['{', '}'];
  
    // Make Array say that they are Array
    if (isArray(value)) {
      array = true;
      braces = ['[', ']'];
    }
  
    // Make functions say that they are functions
    if (isFunction(value)) {
      var n = value.name ? ': ' + value.name : '';
      base = ' [Function' + n + ']';
    }
  
    // Make RegExps say that they are RegExps
    if (isRegExp(value)) {
      base = ' ' + RegExp.prototype.toString.call(value);
    }
  
    // Make dates with properties first say the date
    if (isDate(value)) {
      base = ' ' + Date.prototype.toUTCString.call(value);
    }
  
    // Make error with message first say the error
    if (isError(value)) {
      base = ' ' + formatError(value);
    }
  
    if (keys.length === 0 && (!array || value.length == 0)) {
      return braces[0] + base + braces[1];
    }
  
    if (recurseTimes < 0) {
      if (isRegExp(value)) {
        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
      } else {
        return ctx.stylize('[Object]', 'special');
      }
    }
  
    ctx.seen.push(value);
  
    var output;
    if (array) {
      output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
    } else {
      output = keys.map(function(key) {
        return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
      });
    }
  
    ctx.seen.pop();
  
    return reduceToSingleString(output, base, braces);
  }
  
  
  function formatPrimitive(ctx, value) {
    if (isUndefined(value))
      return ctx.stylize('undefined', 'undefined');
    if (isString(value)) {
      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                               .replace(/'/g, "\\'")
                                               .replace(/\\"/g, '"') + '\'';
      return ctx.stylize(simple, 'string');
    }
    if (isNumber(value))
      return ctx.stylize('' + value, 'number');
    if (isBoolean(value))
      return ctx.stylize('' + value, 'boolean');
    // For some reason typeof null is "object", so special case here.
    if (isNull(value))
      return ctx.stylize('null', 'null');
  }
  
  
  function formatError(value) {
    return '[' + Error.prototype.toString.call(value) + ']';
  }
  
  
  function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
    var output = [];
    for (var i = 0, l = value.length; i < l; ++i) {
      if (hasOwnProperty(value, String(i))) {
        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
            String(i), true));
      } else {
        output.push('');
      }
    }
    keys.forEach(function(key) {
      if (!key.match(/^\d+$/)) {
        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
            key, true));
      }
    });
    return output;
  }
  
  
  function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
    var name, str, desc;
    desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
    if (desc.get) {
      if (desc.set) {
        str = ctx.stylize('[Getter/Setter]', 'special');
      } else {
        str = ctx.stylize('[Getter]', 'special');
      }
    } else {
      if (desc.set) {
        str = ctx.stylize('[Setter]', 'special');
      }
    }
    if (!hasOwnProperty(visibleKeys, key)) {
      name = '[' + key + ']';
    }
    if (!str) {
      if (ctx.seen.indexOf(desc.value) < 0) {
        if (isNull(recurseTimes)) {
          str = formatValue(ctx, desc.value, null);
        } else {
          str = formatValue(ctx, desc.value, recurseTimes - 1);
        }
        if (str.indexOf('\n') > -1) {
          if (array) {
            str = str.split('\n').map(function(line) {
              return '  ' + line;
            }).join('\n').substr(2);
          } else {
            str = '\n' + str.split('\n').map(function(line) {
              return '   ' + line;
            }).join('\n');
          }
        }
      } else {
        str = ctx.stylize('[Circular]', 'special');
      }
    }
    if (isUndefined(name)) {
      if (array && key.match(/^\d+$/)) {
        return str;
      }
      name = JSON.stringify('' + key);
      if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
        name = name.substr(1, name.length - 2);
        name = ctx.stylize(name, 'name');
      } else {
        name = name.replace(/'/g, "\\'")
                   .replace(/\\"/g, '"')
                   .replace(/(^"|"$)/g, "'");
        name = ctx.stylize(name, 'string');
      }
    }
  
    return name + ': ' + str;
  }
  
  
  function reduceToSingleString(output, base, braces) {
    var numLinesEst = 0;
    var length = output.reduce(function(prev, cur) {
      numLinesEst++;
      if (cur.indexOf('\n') >= 0) numLinesEst++;
      return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
    }, 0);
  
    if (length > 60) {
      return braces[0] +
             (base === '' ? '' : base + '\n ') +
             ' ' +
             output.join(',\n  ') +
             ' ' +
             braces[1];
    }
  
    return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
  }
  
  
  // NOTE: These type checking functions intentionally don't use `instanceof`
  // because it is fragile and can be easily faked with `Object.create()`.
  function isArray(ar) {
    return Array.isArray(ar);
  }
  exports.isArray = isArray;
  
  function isBoolean(arg) {
    return typeof arg === 'boolean';
  }
  exports.isBoolean = isBoolean;
  
  function isNull(arg) {
    return arg === null;
  }
  exports.isNull = isNull;
  
  function isNullOrUndefined(arg) {
    return arg == null;
  }
  exports.isNullOrUndefined = isNullOrUndefined;
  
  function isNumber(arg) {
    return typeof arg === 'number';
  }
  exports.isNumber = isNumber;
  
  function isString(arg) {
    return typeof arg === 'string';
  }
  exports.isString = isString;
  
  function isSymbol(arg) {
    return typeof arg === 'symbol';
  }
  exports.isSymbol = isSymbol;
  
  function isUndefined(arg) {
    return arg === void 0;
  }
  exports.isUndefined = isUndefined;
  
  function isRegExp(re) {
    return isObject(re) && objectToString(re) === '[object RegExp]';
  }
  exports.isRegExp = isRegExp;
  
  function isObject(arg) {
    return typeof arg === 'object' && arg !== null;
  }
  exports.isObject = isObject;
  
  function isDate(d) {
    return isObject(d) && objectToString(d) === '[object Date]';
  }
  exports.isDate = isDate;
  
  function isError(e) {
    return isObject(e) &&
        (objectToString(e) === '[object Error]' || e instanceof Error);
  }
  exports.isError = isError;
  
  function isFunction(arg) {
    return typeof arg === 'function';
  }
  exports.isFunction = isFunction;
  
  function isPrimitive(arg) {
    return arg === null ||
           typeof arg === 'boolean' ||
           typeof arg === 'number' ||
           typeof arg === 'string' ||
           typeof arg === 'symbol' ||  // ES6 symbol
           typeof arg === 'undefined';
  }
  exports.isPrimitive = isPrimitive;
  
  exports.isBuffer = require('./support/isBuffer');
  
  function objectToString(o) {
    return Object.prototype.toString.call(o);
  }
  
  
  function pad(n) {
    return n < 10 ? '0' + n.toString(10) : n.toString(10);
  }
  
  
  var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
                'Oct', 'Nov', 'Dec'];
  
  // 26 Feb 16:19:34
  function timestamp() {
    var d = new Date();
    var time = [pad(d.getHours()),
                pad(d.getMinutes()),
                pad(d.getSeconds())].join(':');
    return [d.getDate(), months[d.getMonth()], time].join(' ');
  }
  
  
  // log is just a thin wrapper to console.log that prepends a timestamp
  exports.log = function() {
    console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
  };
  
  
  /**
   * Inherit the prototype methods from one constructor into another.
   *
   * The Function.prototype.inherits from lang.js rewritten as a standalone
   * function (not on Function.prototype). NOTE: If this file is to be loaded
   * during bootstrapping this function needs to be rewritten using some native
   * functions as prototype setup using normal JavaScript does not work as
   * expected during bootstrapping (see mirror.js in r114903).
   *
   * @param {function} ctor Constructor function which needs to inherit the
   *     prototype.
   * @param {function} superCtor Constructor function to inherit prototype from.
   */
  exports.inherits = require('inherits');
  
  exports._extend = function(origin, add) {
    // Don't do anything if add isn't an object
    if (!add || !isObject(add)) return origin;
  
    var keys = Object.keys(add);
    var i = keys.length;
    while (i--) {
      origin[keys[i]] = add[keys[i]];
    }
    return origin;
  };
  
  function hasOwnProperty(obj, prop) {
    return Object.prototype.hasOwnProperty.call(obj, prop);
  }
  
  }).call(this,require("7YKIPe"),typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  },{"./support/isBuffer":18,"7YKIPe":6,"inherits":17}],20:[function(require,module,exports){
  'use strict';
  
  var assert = require('assert');
  var stream = require('stream');
  var hash = require('../index');
  
  describe('writeToStream', function() {
    it('should emit information about an object to a stream', function() {
      var strm = new stream.PassThrough();
      
      hash.writeToStream({foo: 'bar'}, strm);
      var result = strm.read().toString();
      assert.strictEqual(typeof result, 'string');
      assert.notStrictEqual(result.indexOf('foo'), -1);
      assert.notStrictEqual(result.indexOf('bar'), -1);
    });
  
    it('should leave out keys when excludeValues = true', function() {
      var strm = new stream.PassThrough();
      
      hash.writeToStream({foo: 'bar'}, {excludeValues: true}, strm);
      var result = strm.read().toString();
      assert.strictEqual(typeof result, 'string');
      assert.notStrictEqual(result.indexOf('foo'), -1);
      assert.   strictEqual(result.indexOf('bar'), -1);
    });
  });
  
  },{"../index":1,"assert":2,"stream":8}]},{},[20])