text: /*! Amaze UI v2.7.2 ~ IE8 Fucker | by Amaze UI Team | (c) 2019 AllMobilize, Inc. | Licensed under MIT | 2019-03-22T19:52:50+0800 */ 
  /*!
   * https://github.com/es-shims/es5-shim
   * @license es5-shim Copyright 2009-2015 by contributors, MIT License
   * see https://github.com/es-shims/es5-shim/blob/master/LICENSE
   */
  
  // vim: ts=4 sts=4 sw=4 expandtab
  
  // Add semicolon to prevent IIFE from being passed as argument to concatenated code.
  ;
  
  // UMD (Universal Module Definition)
  // see https://github.com/umdjs/umd/blob/master/templates/returnExports.js
  (function (root, factory) {
      'use strict';
  
      /* global define, exports, module */
      if (typeof define === 'function' && define.amd) {
          // AMD. Register as an anonymous module.
          define(factory);
      } else if (typeof exports === 'object') {
          // Node. Does not work with strict CommonJS, but
          // only CommonJS-like enviroments that support module.exports,
          // like Node.
          module.exports = factory();
      } else {
          // Browser globals (root is window)
          root.returnExports = factory();
      }
  }(this, function () {
      /**
       * Brings an environment as close to ECMAScript 5 compliance
       * as is possible with the facilities of erstwhile engines.
       *
       * Annotated ES5: http://es5.github.com/ (specific links below)
       * ES5 Spec: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
       * Required reading: http://javascriptweblog.wordpress.com/2011/12/05/extending-javascript-natives/
       */
  
      // Shortcut to an often accessed properties, in order to avoid multiple
      // dereference that costs universally. This also holds a reference to known-good
      // functions.
      var $Array = Array;
      var ArrayPrototype = $Array.prototype;
      var $Object = Object;
      var ObjectPrototype = $Object.prototype;
      var $Function = Function;
      var FunctionPrototype = $Function.prototype;
      var $String = String;
      var StringPrototype = $String.prototype;
      var $Number = Number;
      var NumberPrototype = $Number.prototype;
      var array_slice = ArrayPrototype.slice;
      var array_splice = ArrayPrototype.splice;
      var array_push = ArrayPrototype.push;
      var array_unshift = ArrayPrototype.unshift;
      var array_concat = ArrayPrototype.concat;
      var array_join = ArrayPrototype.join;
      var call = FunctionPrototype.call;
      var apply = FunctionPrototype.apply;
      var max = Math.max;
      var min = Math.min;
  
      // Having a toString local variable name breaks in Opera so use to_string.
      var to_string = ObjectPrototype.toString;
  
      /* global Symbol */
      /* eslint-disable one-var-declaration-per-line, no-redeclare, max-statements-per-line */
      var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
      var isCallable; /* inlined from https://npmjs.com/is-callable */ var fnToStr = Function.prototype.toString, constructorRegex = /^\s*class /, isES6ClassFn = function isES6ClassFn(value) { try { var fnStr = fnToStr.call(value); var singleStripped = fnStr.replace(/\/\/.*\n/g, ''); var multiStripped = singleStripped.replace(/\/\*[.\s\S]*\*\//g, ''); var spaceStripped = multiStripped.replace(/\n/mg, ' ').replace(/ {2}/g, ' '); return constructorRegex.test(spaceStripped); } catch (e) { return false; /* not a function */ } }, tryFunctionObject = function tryFunctionObject(value) { try { if (isES6ClassFn(value)) { return false; } fnToStr.call(value); return true; } catch (e) { return false; } }, fnClass = '[object Function]', genClass = '[object GeneratorFunction]', isCallable = function isCallable(value) { if (!value) { return false; } if (typeof value !== 'function' && typeof value !== 'object') { return false; } if (hasToStringTag) { return tryFunctionObject(value); } if (isES6ClassFn(value)) { return false; } var strClass = to_string.call(value); return strClass === fnClass || strClass === genClass; };
  
      var isRegex; /* inlined from https://npmjs.com/is-regex */ var regexExec = RegExp.prototype.exec, tryRegexExec = function tryRegexExec(value) { try { regexExec.call(value); return true; } catch (e) { return false; } }, regexClass = '[object RegExp]'; isRegex = function isRegex(value) { if (typeof value !== 'object') { return false; } return hasToStringTag ? tryRegexExec(value) : to_string.call(value) === regexClass; };
      var isString; /* inlined from https://npmjs.com/is-string */ var strValue = String.prototype.valueOf, tryStringObject = function tryStringObject(value) { try { strValue.call(value); return true; } catch (e) { return false; } }, stringClass = '[object String]'; isString = function isString(value) { if (typeof value === 'string') { return true; } if (typeof value !== 'object') { return false; } return hasToStringTag ? tryStringObject(value) : to_string.call(value) === stringClass; };
      /* eslint-enable one-var-declaration-per-line, no-redeclare, max-statements-per-line */
  
      /* inlined from http://npmjs.com/define-properties */
      var supportsDescriptors = $Object.defineProperty && (function () {
          try {
              var obj = {};
              $Object.defineProperty(obj, 'x', { enumerable: false, value: obj });
              for (var _ in obj) { // jscs:ignore disallowUnusedVariables
                  return false;
              }
              return obj.x === obj;
          } catch (e) { /* this is ES3 */
              return false;
          }
      }());
      var defineProperties = (function (has) {
          // Define configurable, writable, and non-enumerable props
          // if they don't exist.
          var defineProperty;
          if (supportsDescriptors) {
              defineProperty = function (object, name, method, forceAssign) {
                  if (!forceAssign && (name in object)) {
                      return;
                  }
                  $Object.defineProperty(object, name, {
                      configurable: true,
                      enumerable: false,
                      writable: true,
                      value: method
                  });
              };
          } else {
              defineProperty = function (object, name, method, forceAssign) {
                  if (!forceAssign && (name in object)) {
                      return;
                  }
                  object[name] = method;
              };
          }
          return function defineProperties(object, map, forceAssign) {
              for (var name in map) {
                  if (has.call(map, name)) {
                      defineProperty(object, name, map[name], forceAssign);
                  }
              }
          };
      }(ObjectPrototype.hasOwnProperty));
  
      //
      // Util
      // ======
      //
  
      /* replaceable with https://npmjs.com/package/es-abstract /helpers/isPrimitive */
      var isPrimitive = function isPrimitive(input) {
          var type = typeof input;
          return input === null || (type !== 'object' && type !== 'function');
      };
  
      var isActualNaN = $Number.isNaN || function isActualNaN(x) {
          return x !== x;
      };
  
      var ES = {
          // ES5 9.4
          // http://es5.github.com/#x9.4
          // http://jsperf.com/to-integer
          /* replaceable with https://npmjs.com/package/es-abstract ES5.ToInteger */
          ToInteger: function ToInteger(num) {
              var n = +num;
              if (isActualNaN(n)) {
                  n = 0;
              } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {
                  n = (n > 0 || -1) * Math.floor(Math.abs(n));
              }
              return n;
          },
  
          /* replaceable with https://npmjs.com/package/es-abstract ES5.ToPrimitive */
          ToPrimitive: function ToPrimitive(input) {
              var val, valueOf, toStr;
              if (isPrimitive(input)) {
                  return input;
              }
              valueOf = input.valueOf;
              if (isCallable(valueOf)) {
                  val = valueOf.call(input);
                  if (isPrimitive(val)) {
                      return val;
                  }
              }
              toStr = input.toString;
              if (isCallable(toStr)) {
                  val = toStr.call(input);
                  if (isPrimitive(val)) {
                      return val;
                  }
              }
              throw new TypeError();
          },
  
          // ES5 9.9
          // http://es5.github.com/#x9.9
          /* replaceable with https://npmjs.com/package/es-abstract ES5.ToObject */
          ToObject: function (o) {
              if (o == null) { // this matches both null and undefined
                  throw new TypeError("can't convert " + o + ' to object');
              }
              return $Object(o);
          },
  
          /* replaceable with https://npmjs.com/package/es-abstract ES5.ToUint32 */
          ToUint32: function ToUint32(x) {
              return x >>> 0;
          }
      };
  
      //
      // Function
      // ========
      //
  
      // ES-5 15.3.4.5
      // http://es5.github.com/#x15.3.4.5
  
      var Empty = function Empty() {};
  
      defineProperties(FunctionPrototype, {
          bind: function bind(that) { // .length is 1
              // 1. Let Target be the this value.
              var target = this;
              // 2. If IsCallable(Target) is false, throw a TypeError exception.
              if (!isCallable(target)) {
                  throw new TypeError('Function.prototype.bind called on incompatible ' + target);
              }
              // 3. Let A be a new (possibly empty) internal list of all of the
              //   argument values provided after thisArg (arg1, arg2 etc), in order.
              // XXX slicedArgs will stand in for "A" if used
              var args = array_slice.call(arguments, 1); // for normal call
              // 4. Let F be a new native ECMAScript object.
              // 11. Set the [[Prototype]] internal property of F to the standard
              //   built-in Function prototype object as specified in 15.3.3.1.
              // 12. Set the [[Call]] internal property of F as described in
              //   15.3.4.5.1.
              // 13. Set the [[Construct]] internal property of F as described in
              //   15.3.4.5.2.
              // 14. Set the [[HasInstance]] internal property of F as described in
              //   15.3.4.5.3.
              var bound;
              var binder = function () {
  
                  if (this instanceof bound) {
                      // 15.3.4.5.2 [[Construct]]
                      // When the [[Construct]] internal method of a function object,
                      // F that was created using the bind function is called with a
                      // list of arguments ExtraArgs, the following steps are taken:
                      // 1. Let target be the value of F's [[TargetFunction]]
                      //   internal property.
                      // 2. If target has no [[Construct]] internal method, a
                      //   TypeError exception is thrown.
                      // 3. Let boundArgs be the value of F's [[BoundArgs]] internal
                      //   property.
                      // 4. Let args be a new list containing the same values as the
                      //   list boundArgs in the same order followed by the same
                      //   values as the list ExtraArgs in the same order.
                      // 5. Return the result of calling the [[Construct]] internal
                      //   method of target providing args as the arguments.
  
                      var result = apply.call(
                          target,
                          this,
                          array_concat.call(args, array_slice.call(arguments))
                      );
                      if ($Object(result) === result) {
                          return result;
                      }
                      return this;
  
                  } else {
                      // 15.3.4.5.1 [[Call]]
                      // When the [[Call]] internal method of a function object, F,
                      // which was created using the bind function is called with a
                      // this value and a list of arguments ExtraArgs, the following
                      // steps are taken:
                      // 1. Let boundArgs be the value of F's [[BoundArgs]] internal
                      //   property.
                      // 2. Let boundThis be the value of F's [[BoundThis]] internal
                      //   property.
                      // 3. Let target be the value of F's [[TargetFunction]] internal
                      //   property.
                      // 4. Let args be a new list containing the same values as the
                      //   list boundArgs in the same order followed by the same
                      //   values as the list ExtraArgs in the same order.
                      // 5. Return the result of calling the [[Call]] internal method
                      //   of target providing boundThis as the this value and
                      //   providing args as the arguments.
  
                      // equiv: target.call(this, ...boundArgs, ...args)
                      return apply.call(
                          target,
                          that,
                          array_concat.call(args, array_slice.call(arguments))
                      );
  
                  }
  
              };
  
              // 15. If the [[Class]] internal property of Target is "Function", then
              //     a. Let L be the length property of Target minus the length of A.
              //     b. Set the length own property of F to either 0 or L, whichever is
              //       larger.
              // 16. Else set the length own property of F to 0.
  
              var boundLength = max(0, target.length - args.length);
  
              // 17. Set the attributes of the length own property of F to the values
              //   specified in 15.3.5.1.
              var boundArgs = [];
              for (var i = 0; i < boundLength; i++) {
                  array_push.call(boundArgs, '$' + i);
              }
  
              // XXX Build a dynamic function with desired amount of arguments is the only
              // way to set the length property of a function.
              // In environments where Content Security Policies enabled (Chrome extensions,
              // for ex.) all use of eval or Function costructor throws an exception.
              // However in all of these environments Function.prototype.bind exists
              // and so this code will never be executed.
              bound = $Function('binder', 'return function (' + array_join.call(boundArgs, ',') + '){ return binder.apply(this, arguments); }')(binder);
  
              if (target.prototype) {
                  Empty.prototype = target.prototype;
                  bound.prototype = new Empty();
                  // Clean up dangling references.
                  Empty.prototype = null;
              }
  
              // TODO
              // 18. Set the [[Extensible]] internal property of F to true.
  
              // TODO
              // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).
              // 20. Call the [[DefineOwnProperty]] internal method of F with
              //   arguments "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]:
              //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and
              //   false.
              // 21. Call the [[DefineOwnProperty]] internal method of F with
              //   arguments "arguments", PropertyDescriptor {[[Get]]: thrower,
              //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},
              //   and false.
  
              // TODO
              // NOTE Function objects created using Function.prototype.bind do not
              // have a prototype property or the [[Code]], [[FormalParameters]], and
              // [[Scope]] internal properties.
              // XXX can't delete prototype in pure-js.
  
              // 22. Return F.
              return bound;
          }
      });
  
      // _Please note: Shortcuts are defined after `Function.prototype.bind` as we
      // use it in defining shortcuts.
      var owns = call.bind(ObjectPrototype.hasOwnProperty);
      var toStr = call.bind(ObjectPrototype.toString);
      var arraySlice = call.bind(array_slice);
      var arraySliceApply = apply.bind(array_slice);
      var strSlice = call.bind(StringPrototype.slice);
      var strSplit = call.bind(StringPrototype.split);
      var strIndexOf = call.bind(StringPrototype.indexOf);
      var pushCall = call.bind(array_push);
      var isEnum = call.bind(ObjectPrototype.propertyIsEnumerable);
      var arraySort = call.bind(ArrayPrototype.sort);
  
      //
      // Array
      // =====
      //
  
      var isArray = $Array.isArray || function isArray(obj) {
          return toStr(obj) === '[object Array]';
      };
  
      // ES5 15.4.4.12
      // http://es5.github.com/#x15.4.4.13
      // Return len+argCount.
      // [bugfix, ielt8]
      // IE < 8 bug: [].unshift(0) === undefined but should be "1"
      var hasUnshiftReturnValueBug = [].unshift(0) !== 1;
      defineProperties(ArrayPrototype, {
          unshift: function () {
              array_unshift.apply(this, arguments);
              return this.length;
          }
      }, hasUnshiftReturnValueBug);
  
      // ES5 15.4.3.2
      // http://es5.github.com/#x15.4.3.2
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray
      defineProperties($Array, { isArray: isArray });
  
      // The IsCallable() check in the Array functions
      // has been replaced with a strict check on the
      // internal class of the object to trap cases where
      // the provided function was actually a regular
      // expression literal, which in V8 and
      // JavaScriptCore is a typeof "function".  Only in
      // V8 are regular expression literals permitted as
      // reduce parameters, so it is desirable in the
      // general case for the shim to match the more
      // strict and common behavior of rejecting regular
      // expressions.
  
      // ES5 15.4.4.18
      // http://es5.github.com/#x15.4.4.18
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/forEach
  
      // Check failure of by-index access of string characters (IE < 9)
      // and failure of `0 in boxedString` (Rhino)
      var boxedString = $Object('a');
      var splitString = boxedString[0] !== 'a' || !(0 in boxedString);
  
      var properlyBoxesContext = function properlyBoxed(method) {
          // Check node 0.6.21 bug where third parameter is not boxed
          var properlyBoxesNonStrict = true;
          var properlyBoxesStrict = true;
          var threwException = false;
          if (method) {
              try {
                  method.call('foo', function (_, __, context) {
                      if (typeof context !== 'object') {
                          properlyBoxesNonStrict = false;
                      }
                  });
  
                  method.call([1], function () {
                      'use strict';
  
                      properlyBoxesStrict = typeof this === 'string';
                  }, 'x');
              } catch (e) {
                  threwException = true;
              }
          }
          return !!method && !threwException && properlyBoxesNonStrict && properlyBoxesStrict;
      };
  
      defineProperties(ArrayPrototype, {
          forEach: function forEach(callbackfn/*, thisArg*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var i = -1;
              var length = ES.ToUint32(self.length);
              var T;
              if (arguments.length > 1) {
                  T = arguments[1];
              }
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.forEach callback must be a function');
              }
  
              while (++i < length) {
                  if (i in self) {
                      // Invoke the callback function with call, passing arguments:
                      // context, property value, property key, thisArg object
                      if (typeof T === 'undefined') {
                          callbackfn(self[i], i, object);
                      } else {
                          callbackfn.call(T, self[i], i, object);
                      }
                  }
              }
          }
      }, !properlyBoxesContext(ArrayPrototype.forEach));
  
      // ES5 15.4.4.19
      // http://es5.github.com/#x15.4.4.19
      // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map
      defineProperties(ArrayPrototype, {
          map: function map(callbackfn/*, thisArg*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
              var result = $Array(length);
              var T;
              if (arguments.length > 1) {
                  T = arguments[1];
              }
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.map callback must be a function');
              }
  
              for (var i = 0; i < length; i++) {
                  if (i in self) {
                      if (typeof T === 'undefined') {
                          result[i] = callbackfn(self[i], i, object);
                      } else {
                          result[i] = callbackfn.call(T, self[i], i, object);
                      }
                  }
              }
              return result;
          }
      }, !properlyBoxesContext(ArrayPrototype.map));
  
      // ES5 15.4.4.20
      // http://es5.github.com/#x15.4.4.20
      // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/filter
      defineProperties(ArrayPrototype, {
          filter: function filter(callbackfn/*, thisArg*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
              var result = [];
              var value;
              var T;
              if (arguments.length > 1) {
                  T = arguments[1];
              }
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.filter callback must be a function');
              }
  
              for (var i = 0; i < length; i++) {
                  if (i in self) {
                      value = self[i];
                      if (typeof T === 'undefined' ? callbackfn(value, i, object) : callbackfn.call(T, value, i, object)) {
                          pushCall(result, value);
                      }
                  }
              }
              return result;
          }
      }, !properlyBoxesContext(ArrayPrototype.filter));
  
      // ES5 15.4.4.16
      // http://es5.github.com/#x15.4.4.16
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/every
      defineProperties(ArrayPrototype, {
          every: function every(callbackfn/*, thisArg*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
              var T;
              if (arguments.length > 1) {
                  T = arguments[1];
              }
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.every callback must be a function');
              }
  
              for (var i = 0; i < length; i++) {
                  if (i in self && !(typeof T === 'undefined' ? callbackfn(self[i], i, object) : callbackfn.call(T, self[i], i, object))) {
                      return false;
                  }
              }
              return true;
          }
      }, !properlyBoxesContext(ArrayPrototype.every));
  
      // ES5 15.4.4.17
      // http://es5.github.com/#x15.4.4.17
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/some
      defineProperties(ArrayPrototype, {
          some: function some(callbackfn/*, thisArg */) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
              var T;
              if (arguments.length > 1) {
                  T = arguments[1];
              }
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.some callback must be a function');
              }
  
              for (var i = 0; i < length; i++) {
                  if (i in self && (typeof T === 'undefined' ? callbackfn(self[i], i, object) : callbackfn.call(T, self[i], i, object))) {
                      return true;
                  }
              }
              return false;
          }
      }, !properlyBoxesContext(ArrayPrototype.some));
  
      // ES5 15.4.4.21
      // http://es5.github.com/#x15.4.4.21
      // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduce
      var reduceCoercesToObject = false;
      if (ArrayPrototype.reduce) {
          reduceCoercesToObject = typeof ArrayPrototype.reduce.call('es5', function (_, __, ___, list) {
              return list;
          }) === 'object';
      }
      defineProperties(ArrayPrototype, {
          reduce: function reduce(callbackfn/*, initialValue*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.reduce callback must be a function');
              }
  
              // no value to return if no initial value and an empty array
              if (length === 0 && arguments.length === 1) {
                  throw new TypeError('reduce of empty array with no initial value');
              }
  
              var i = 0;
              var result;
              if (arguments.length >= 2) {
                  result = arguments[1];
              } else {
                  do {
                      if (i in self) {
                          result = self[i++];
                          break;
                      }
  
                      // if array contains no values, no initial value to return
                      if (++i >= length) {
                          throw new TypeError('reduce of empty array with no initial value');
                      }
                  } while (true);
              }
  
              for (; i < length; i++) {
                  if (i in self) {
                      result = callbackfn(result, self[i], i, object);
                  }
              }
  
              return result;
          }
      }, !reduceCoercesToObject);
  
      // ES5 15.4.4.22
      // http://es5.github.com/#x15.4.4.22
      // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduceRight
      var reduceRightCoercesToObject = false;
      if (ArrayPrototype.reduceRight) {
          reduceRightCoercesToObject = typeof ArrayPrototype.reduceRight.call('es5', function (_, __, ___, list) {
              return list;
          }) === 'object';
      }
      defineProperties(ArrayPrototype, {
          reduceRight: function reduceRight(callbackfn/*, initial*/) {
              var object = ES.ToObject(this);
              var self = splitString && isString(this) ? strSplit(this, '') : object;
              var length = ES.ToUint32(self.length);
  
              // If no callback function or if callback is not a callable function
              if (!isCallable(callbackfn)) {
                  throw new TypeError('Array.prototype.reduceRight callback must be a function');
              }
  
              // no value to return if no initial value, empty array
              if (length === 0 && arguments.length === 1) {
                  throw new TypeError('reduceRight of empty array with no initial value');
              }
  
              var result;
              var i = length - 1;
              if (arguments.length >= 2) {
                  result = arguments[1];
              } else {
                  do {
                      if (i in self) {
                          result = self[i--];
                          break;
                      }
  
                      // if array contains no values, no initial value to return
                      if (--i < 0) {
                          throw new TypeError('reduceRight of empty array with no initial value');
                      }
                  } while (true);
              }
  
              if (i < 0) {
                  return result;
              }
  
              do {
                  if (i in self) {
                      result = callbackfn(result, self[i], i, object);
                  }
              } while (i--);
  
              return result;
          }
      }, !reduceRightCoercesToObject);
  
      // ES5 15.4.4.14
      // http://es5.github.com/#x15.4.4.14
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
      var hasFirefox2IndexOfBug = ArrayPrototype.indexOf && [0, 1].indexOf(1, 2) !== -1;
      defineProperties(ArrayPrototype, {
          indexOf: function indexOf(searchElement/*, fromIndex */) {
              var self = splitString && isString(this) ? strSplit(this, '') : ES.ToObject(this);
              var length = ES.ToUint32(self.length);
  
              if (length === 0) {
                  return -1;
              }
  
              var i = 0;
              if (arguments.length > 1) {
                  i = ES.ToInteger(arguments[1]);
              }
  
              // handle negative indices
              i = i >= 0 ? i : max(0, length + i);
              for (; i < length; i++) {
                  if (i in self && self[i] === searchElement) {
                      return i;
                  }
              }
              return -1;
          }
      }, hasFirefox2IndexOfBug);
  
      // ES5 15.4.4.15
      // http://es5.github.com/#x15.4.4.15
      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf
      var hasFirefox2LastIndexOfBug = ArrayPrototype.lastIndexOf && [0, 1].lastIndexOf(0, -3) !== -1;
      defineProperties(ArrayPrototype, {
          lastIndexOf: function lastIndexOf(searchElement/*, fromIndex */) {
              var self = splitString && isString(this) ? strSplit(this, '') : ES.ToObject(this);
              var length = ES.ToUint32(self.length);
  
              if (length === 0) {
                  return -1;
              }
              var i = length - 1;
              if (arguments.length > 1) {
                  i = min(i, ES.ToInteger(arguments[1]));
              }
              // handle negative indices
              i = i >= 0 ? i : length - Math.abs(i);
              for (; i >= 0; i--) {
                  if (i in self && searchElement === self[i]) {
                      return i;
                  }
              }
              return -1;
          }
      }, hasFirefox2LastIndexOfBug);
  
      // ES5 15.4.4.12
      // http://es5.github.com/#x15.4.4.12
      var spliceNoopReturnsEmptyArray = (function () {
          var a = [1, 2];
          var result = a.splice();
          return a.length === 2 && isArray(result) && result.length === 0;
      }());
      defineProperties(ArrayPrototype, {
          // Safari 5.0 bug where .splice() returns undefined
          splice: function splice(start, deleteCount) {
              if (arguments.length === 0) {
                  return [];
              } else {
                  return array_splice.apply(this, arguments);
              }
          }
      }, !spliceNoopReturnsEmptyArray);
  
      var spliceWorksWithEmptyObject = (function () {
          var obj = {};
          ArrayPrototype.splice.call(obj, 0, 0, 1);
          return obj.length === 1;
      }());
      defineProperties(ArrayPrototype, {
          splice: function splice(start, deleteCount) {
              if (arguments.length === 0) {
                  return [];
              }
              var args = arguments;
              this.length = max(ES.ToInteger(this.length), 0);
              if (arguments.length > 0 && typeof deleteCount !== 'number') {
                  args = arraySlice(arguments);
                  if (args.length < 2) {
                      pushCall(args, this.length - start);
                  } else {
                      args[1] = ES.ToInteger(deleteCount);
                  }
              }
              return array_splice.apply(this, args);
          }
      }, !spliceWorksWithEmptyObject);
      var spliceWorksWithLargeSparseArrays = (function () {
          // Per https://github.com/es-shims/es5-shim/issues/295
          // Safari 7/8 breaks with sparse arrays of size 1e5 or greater
          var arr = new $Array(1e5);
          // note: the index MUST be 8 or larger or the test will false pass
          arr[8] = 'x';
          arr.splice(1, 1);
          // note: this test must be defined *after* the indexOf shim
          // per https://github.com/es-shims/es5-shim/issues/313
          return arr.indexOf('x') === 7;
      }());
      var spliceWorksWithSmallSparseArrays = (function () {
          // Per https://github.com/es-shims/es5-shim/issues/295
          // Opera 12.15 breaks on this, no idea why.
          var n = 256;
          var arr = [];
          arr[n] = 'a';
          arr.splice(n + 1, 0, 'b');
          return arr[n] === 'a';
      }());
      defineProperties(ArrayPrototype, {
          splice: function splice(start, deleteCount) {
              var O = ES.ToObject(this);
              var A = [];
              var len = ES.ToUint32(O.length);
              var relativeStart = ES.ToInteger(start);
              var actualStart = relativeStart < 0 ? max((len + relativeStart), 0) : min(relativeStart, len);
              var actualDeleteCount = min(max(ES.ToInteger(deleteCount), 0), len - actualStart);
  
              var k = 0;
              var from;
              while (k < actualDeleteCount) {
                  from = $String(actualStart + k);
                  if (owns(O, from)) {
                      A[k] = O[from];
                  }
                  k += 1;
              }
  
              var items = arraySlice(arguments, 2);
              var itemCount = items.length;
              var to;
              if (itemCount < actualDeleteCount) {
                  k = actualStart;
                  var maxK = len - actualDeleteCount;
                  while (k < maxK) {
                      from = $String(k + actualDeleteCount);
                      to = $String(k + itemCount);
                      if (owns(O, from)) {
                          O[to] = O[from];
                      } else {
                          delete O[to];
                      }
                      k += 1;
                  }
                  k = len;
                  var minK = len - actualDeleteCount + itemCount;
                  while (k > minK) {
                      delete O[k - 1];
                      k -= 1;
                  }
              } else if (itemCount > actualDeleteCount) {
                  k = len - actualDeleteCount;
                  while (k > actualStart) {
                      from = $String(k + actualDeleteCount - 1);
                      to = $String(k + itemCount - 1);
                      if (owns(O, from)) {
                          O[to] = O[from];
                      } else {
                          delete O[to];
                      }
                      k -= 1;
                  }
              }
              k = actualStart;
              for (var i = 0; i < items.length; ++i) {
                  O[k] = items[i];
                  k += 1;
              }
              O.length = len - actualDeleteCount + itemCount;
  
              return A;
          }
      }, !spliceWorksWithLargeSparseArrays || !spliceWorksWithSmallSparseArrays);
  
      var originalJoin = ArrayPrototype.join;
      var hasStringJoinBug;
      try {
          hasStringJoinBug = Array.prototype.join.call('123', ',') !== '1,2,3';
      } catch (e) {
          hasStringJoinBug = true;
      }
      if (hasStringJoinBug) {
          defineProperties(ArrayPrototype, {
              join: function join(separator) {
                  var sep = typeof separator === 'undefined' ? ',' : separator;
                  return originalJoin.call(isString(this) ? strSplit(this, '') : this, sep);
              }
          }, hasStringJoinBug);
      }
  
      var hasJoinUndefinedBug = [1, 2].join(undefined) !== '1,2';
      if (hasJoinUndefinedBug) {
          defineProperties(ArrayPrototype, {
              join: function join(separator) {
                  var sep = typeof separator === 'undefined' ? ',' : separator;
                  return originalJoin.call(this, sep);
              }
          }, hasJoinUndefinedBug);
      }
  
      var pushShim = function push(item) {
          var O = ES.ToObject(this);
          var n = ES.ToUint32(O.length);
          var i = 0;
          while (i < arguments.length) {
              O[n + i] = arguments[i];
              i += 1;
          }
          O.length = n + i;
          return n + i;
      };
  
      var pushIsNotGeneric = (function () {
          var obj = {};
          var result = Array.prototype.push.call(obj, undefined);
          return result !== 1 || obj.length !== 1 || typeof obj[0] !== 'undefined' || !owns(obj, 0);
      }());
      defineProperties(ArrayPrototype, {
          push: function push(item) {
              if (isArray(this)) {
                  return array_push.apply(this, arguments);
              }
              return pushShim.apply(this, arguments);
          }
      }, pushIsNotGeneric);
  
      // This fixes a very weird bug in Opera 10.6 when pushing `undefined
      var pushUndefinedIsWeird = (function () {
          var arr = [];
          var result = arr.push(undefined);
          return result !== 1 || arr.length !== 1 || typeof arr[0] !== 'undefined' || !owns(arr, 0);
      }());
      defineProperties(ArrayPrototype, { push: pushShim }, pushUndefinedIsWeird);
  
      // ES5 15.2.3.14
      // http://es5.github.io/#x15.4.4.10
      // Fix boxed string bug
      defineProperties(ArrayPrototype, {
          slice: function (start, end) {
              var arr = isString(this) ? strSplit(this, '') : this;
              return arraySliceApply(arr, arguments);
          }
      }, splitString);
  
      var sortIgnoresNonFunctions = (function () {
          try {
              [1, 2].sort(null);
              [1, 2].sort({});
              return true;
          } catch (e) {}
          return false;
      }());
      var sortThrowsOnRegex = (function () {
          // this is a problem in Firefox 4, in which `typeof /a/ === 'function'`
          try {
              [1, 2].sort(/a/);
              return false;
          } catch (e) {}
          return true;
      }());
      var sortIgnoresUndefined = (function () {
          // applies in IE 8, for one.
          try {
              [1, 2].sort(undefined);
              return true;
          } catch (e) {}
          return false;
      }());
      defineProperties(ArrayPrototype, {
          sort: function sort(compareFn) {
              if (typeof compareFn === 'undefined') {
                  return arraySort(this);
              }
              if (!isCallable(compareFn)) {
                  throw new TypeError('Array.prototype.sort callback must be a function');
              }
              return arraySort(this, compareFn);
          }
      }, sortIgnoresNonFunctions || !sortIgnoresUndefined || !sortThrowsOnRegex);
  
      //
      // Object
      // ======
      //
  
      // ES5 15.2.3.14
      // http://es5.github.com/#x15.2.3.14
  
      // http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-implementation
      var hasDontEnumBug = !isEnum({ 'toString': null }, 'toString');
      var hasProtoEnumBug = isEnum(function () {}, 'prototype');
      var hasStringEnumBug = !owns('x', '0');
      var equalsConstructorPrototype = function (o) {
          var ctor = o.constructor;
          return ctor && ctor.prototype === o;
      };
      var blacklistedKeys = {
          $window: true,
          $console: true,
          $parent: true,
          $self: true,
          $frame: true,
          $frames: true,
          $frameElement: true,
          $webkitIndexedDB: true,
          $webkitStorageInfo: true,
          $external: true
      };
      var hasAutomationEqualityBug = (function () {
          /* globals window */
          if (typeof window === 'undefined') {
              return false;
          }
          for (var k in window) {
              try {
                  if (!blacklistedKeys['$' + k] && owns(window, k) && window[k] !== null && typeof window[k] === 'object') {
                      equalsConstructorPrototype(window[k]);
                  }
              } catch (e) {
                  return true;
              }
          }
          return false;
      }());
      var equalsConstructorPrototypeIfNotBuggy = function (object) {
          if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
              return equalsConstructorPrototype(object);
          }
          try {
              return equalsConstructorPrototype(object);
          } catch (e) {
              return false;
          }
      };
      var dontEnums = [
          'toString',
          'toLocaleString',
          'valueOf',
          'hasOwnProperty',
          'isPrototypeOf',
          'propertyIsEnumerable',
          'constructor'
      ];
      var dontEnumsLength = dontEnums.length;
  
      // taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js
      // can be replaced with require('is-arguments') if we ever use a build process instead
      var isStandardArguments = function isArguments(value) {
          return toStr(value) === '[object Arguments]';
      };
      var isLegacyArguments = function isArguments(value) {
          return value !== null &&
              typeof value === 'object' &&
              typeof value.length === 'number' &&
              value.length >= 0 &&
              !isArray(value) &&
              isCallable(value.callee);
      };
      var isArguments = isStandardArguments(arguments) ? isStandardArguments : isLegacyArguments;
  
      defineProperties($Object, {
          keys: function keys(object) {
              var isFn = isCallable(object);
              var isArgs = isArguments(object);
              var isObject = object !== null && typeof object === 'object';
              var isStr = isObject && isString(object);
  
              if (!isObject && !isFn && !isArgs) {
                  throw new TypeError('Object.keys called on a non-object');
              }
  
              var theKeys = [];
              var skipProto = hasProtoEnumBug && isFn;
              if ((isStr && hasStringEnumBug) || isArgs) {
                  for (var i = 0; i < object.length; ++i) {
                      pushCall(theKeys, $String(i));
                  }
              }
  
              if (!isArgs) {
                  for (var name in object) {
                      if (!(skipProto && name === 'prototype') && owns(object, name)) {
                          pushCall(theKeys, $String(name));
                      }
                  }
              }
  
              if (hasDontEnumBug) {
                  var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
                  for (var j = 0; j < dontEnumsLength; j++) {
                      var dontEnum = dontEnums[j];
                      if (!(skipConstructor && dontEnum === 'constructor') && owns(object, dontEnum)) {
                          pushCall(theKeys, dontEnum);
                      }
                  }
              }
              return theKeys;
          }
      });
  
      var keysWorksWithArguments = $Object.keys && (function () {
          // Safari 5.0 bug
          return $Object.keys(arguments).length === 2;
      }(1, 2));
      var keysHasArgumentsLengthBug = $Object.keys && (function () {
          var argKeys = $Object.keys(arguments);
          return arguments.length !== 1 || argKeys.length !== 1 || argKeys[0] !== 1;
      }(1));
      var originalKeys = $Object.keys;
      defineProperties($Object, {
          keys: function keys(object) {
              if (isArguments(object)) {
                  return originalKeys(arraySlice(object));
              } else {
                  return originalKeys(object);
              }
          }
      }, !keysWorksWithArguments || keysHasArgumentsLengthBug);
  
      //
      // Date
      // ====
      //
  
      var hasNegativeMonthYearBug = new Date(-3509827329600292).getUTCMonth() !== 0;
      var aNegativeTestDate = new Date(-1509842289600292);
      var aPositiveTestDate = new Date(1449662400000);
      var hasToUTCStringFormatBug = aNegativeTestDate.toUTCString() !== 'Mon, 01 Jan -45875 11:59:59 GMT';
      var hasToDateStringFormatBug;
      var hasToStringFormatBug;
      var timeZoneOffset = aNegativeTestDate.getTimezoneOffset();
      if (timeZoneOffset < -720) {
          hasToDateStringFormatBug = aNegativeTestDate.toDateString() !== 'Tue Jan 02 -45875';
          hasToStringFormatBug = !(/^Thu Dec 10 2015 \d\d:\d\d:\d\d GMT[-\+]\d\d\d\d(?: |$)/).test(aPositiveTestDate.toString());
      } else {
          hasToDateStringFormatBug = aNegativeTestDate.toDateString() !== 'Mon Jan 01 -45875';
          hasToStringFormatBug = !(/^Wed Dec 09 2015 \d\d:\d\d:\d\d GMT[-\+]\d\d\d\d(?: |$)/).test(aPositiveTestDate.toString());
      }
  
      var originalGetFullYear = call.bind(Date.prototype.getFullYear);
      var originalGetMonth = call.bind(Date.prototype.getMonth);
      var originalGetDate = call.bind(Date.prototype.getDate);
      var originalGetUTCFullYear = call.bind(Date.prototype.getUTCFullYear);
      var originalGetUTCMonth = call.bind(Date.prototype.getUTCMonth);
      var originalGetUTCDate = call.bind(Date.prototype.getUTCDate);
      var originalGetUTCDay = call.bind(Date.prototype.getUTCDay);
      var originalGetUTCHours = call.bind(Date.prototype.getUTCHours);
      var originalGetUTCMinutes = call.bind(Date.prototype.getUTCMinutes);
      var originalGetUTCSeconds = call.bind(Date.prototype.getUTCSeconds);
      var originalGetUTCMilliseconds = call.bind(Date.prototype.getUTCMilliseconds);
      var dayName = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
      var monthName = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
      var daysInMonth = function daysInMonth(month, year) {
          return originalGetDate(new Date(year, month, 0));
      };
  
      defineProperties(Date.prototype, {
          getFullYear: function getFullYear() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetFullYear(this);
              if (year < 0 && originalGetMonth(this) > 11) {
                  return year + 1;
              }
              return year;
          },
          getMonth: function getMonth() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetFullYear(this);
              var month = originalGetMonth(this);
              if (year < 0 && month > 11) {
                  return 0;
              }
              return month;
          },
          getDate: function getDate() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetFullYear(this);
              var month = originalGetMonth(this);
              var date = originalGetDate(this);
              if (year < 0 && month > 11) {
                  if (month === 12) {
                      return date;
                  }
                  var days = daysInMonth(0, year + 1);
                  return (days - date) + 1;
              }
              return date;
          },
          getUTCFullYear: function getUTCFullYear() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetUTCFullYear(this);
              if (year < 0 && originalGetUTCMonth(this) > 11) {
                  return year + 1;
              }
              return year;
          },
          getUTCMonth: function getUTCMonth() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetUTCFullYear(this);
              var month = originalGetUTCMonth(this);
              if (year < 0 && month > 11) {
                  return 0;
              }
              return month;
          },
          getUTCDate: function getUTCDate() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var year = originalGetUTCFullYear(this);
              var month = originalGetUTCMonth(this);
              var date = originalGetUTCDate(this);
              if (year < 0 && month > 11) {
                  if (month === 12) {
                      return date;
                  }
                  var days = daysInMonth(0, year + 1);
                  return (days - date) + 1;
              }
              return date;
          }
      }, hasNegativeMonthYearBug);
  
      defineProperties(Date.prototype, {
          toUTCString: function toUTCString() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var day = originalGetUTCDay(this);
              var date = originalGetUTCDate(this);
              var month = originalGetUTCMonth(this);
              var year = originalGetUTCFullYear(this);
              var hour = originalGetUTCHours(this);
              var minute = originalGetUTCMinutes(this);
              var second = originalGetUTCSeconds(this);
              return dayName[day] + ', ' +
                  (date < 10 ? '0' + date : date) + ' ' +
                  monthName[month] + ' ' +
                  year + ' ' +
                  (hour < 10 ? '0' + hour : hour) + ':' +
                  (minute < 10 ? '0' + minute : minute) + ':' +
                  (second < 10 ? '0' + second : second) + ' GMT';
          }
      }, hasNegativeMonthYearBug || hasToUTCStringFormatBug);
  
      // Opera 12 has `,`
      defineProperties(Date.prototype, {
          toDateString: function toDateString() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var day = this.getDay();
              var date = this.getDate();
              var month = this.getMonth();
              var year = this.getFullYear();
              return dayName[day] + ' ' +
                  monthName[month] + ' ' +
                  (date < 10 ? '0' + date : date) + ' ' +
                  year;
          }
      }, hasNegativeMonthYearBug || hasToDateStringFormatBug);
  
      // can't use defineProperties here because of toString enumeration issue in IE <= 8
      if (hasNegativeMonthYearBug || hasToStringFormatBug) {
          Date.prototype.toString = function toString() {
              if (!this || !(this instanceof Date)) {
                  throw new TypeError('this is not a Date object.');
              }
              var day = this.getDay();
              var date = this.getDate();
              var month = this.getMonth();
              var year = this.getFullYear();
              var hour = this.getHours();
              var minute = this.getMinutes();
              var second = this.getSeconds();
              var timezoneOffset = this.getTimezoneOffset();
              var hoursOffset = Math.floor(Math.abs(timezoneOffset) / 60);
              var minutesOffset = Math.floor(Math.abs(timezoneOffset) % 60);
              return dayName[day] + ' ' +
                  monthName[month] + ' ' +
                  (date < 10 ? '0' + date : date) + ' ' +
                  year + ' ' +
                  (hour < 10 ? '0' + hour : hour) + ':' +
                  (minute < 10 ? '0' + minute : minute) + ':' +
                  (second < 10 ? '0' + second : second) + ' GMT' +
                  (timezoneOffset > 0 ? '-' : '+') +
                  (hoursOffset < 10 ? '0' + hoursOffset : hoursOffset) +
                  (minutesOffset < 10 ? '0' + minutesOffset : minutesOffset);
          };
          if (supportsDescriptors) {
              $Object.defineProperty(Date.prototype, 'toString', {
                  configurable: true,
                  enumerable: false,
                  writable: true
              });
          }
      }
  
      // ES5 15.9.5.43
      // http://es5.github.com/#x15.9.5.43
      // This function returns a String value represent the instance in time
      // represented by this Date object. The format of the String is the Date Time
      // string format defined in 15.9.1.15. All fields are present in the String.
      // The time zone is always UTC, denoted by the suffix Z. If the time value of
      // this object is not a finite Number a RangeError exception is thrown.
      var negativeDate = -62198755200000;
      var negativeYearString = '-000001';
      var hasNegativeDateBug = Date.prototype.toISOString && new Date(negativeDate).toISOString().indexOf(negativeYearString) === -1;
      var hasSafari51DateBug = Date.prototype.toISOString && new Date(-1).toISOString() !== '1969-12-31T23:59:59.999Z';
  
      var getTime = call.bind(Date.prototype.getTime);
  
      defineProperties(Date.prototype, {
          toISOString: function toISOString() {
              if (!isFinite(this) || !isFinite(getTime(this))) {
                  // Adope Photoshop requires the second check.
                  throw new RangeError('Date.prototype.toISOString called on non-finite value.');
              }
  
              var year = originalGetUTCFullYear(this);
  
              var month = originalGetUTCMonth(this);
              // see https://github.com/es-shims/es5-shim/issues/111
              year += Math.floor(month / 12);
              month = (month % 12 + 12) % 12;
  
              // the date time string format is specified in 15.9.1.15.
              var result = [month + 1, originalGetUTCDate(this), originalGetUTCHours(this), originalGetUTCMinutes(this), originalGetUTCSeconds(this)];
              year = (
                  (year < 0 ? '-' : (year > 9999 ? '+' : '')) +
                  strSlice('00000' + Math.abs(year), (0 <= year && year <= 9999) ? -4 : -6)
              );
  
              for (var i = 0; i < result.length; ++i) {
                  // pad months, days, hours, minutes, and seconds to have two digits.
                  result[i] = strSlice('00' + result[i], -2);
              }
              // pad milliseconds to have three digits.
              return (
                  year + '-' + arraySlice(result, 0, 2).join('-') +
                  'T' + arraySlice(result, 2).join(':') + '.' +
                  strSlice('000' + originalGetUTCMilliseconds(this), -3) + 'Z'
              );
          }
      }, hasNegativeDateBug || hasSafari51DateBug);
  
      // ES5 15.9.5.44
      // http://es5.github.com/#x15.9.5.44
      // This function provides a String representation of a Date object for use by
      // JSON.stringify (15.12.3).
      var dateToJSONIsSupported = (function () {
          try {
              return Date.prototype.toJSON &&
                  new Date(NaN).toJSON() === null &&
                  new Date(negativeDate).toJSON().indexOf(negativeYearString) !== -1 &&
                  Date.prototype.toJSON.call({ // generic
                      toISOString: function () { return true; }
                  });
          } catch (e) {
              return false;
          }
      }());
      if (!dateToJSONIsSupported) {
          Date.prototype.toJSON = function toJSON(key) {
              // When the toJSON method is called with argument key, the following
              // steps are taken:
  
              // 1.  Let O be the result of calling ToObject, giving it the this
              // value as its argument.
              // 2. Let tv be ES.ToPrimitive(O, hint Number).
              var O = $Object(this);
              var tv = ES.ToPrimitive(O);
              // 3. If tv is a Number and is not finite, return null.
              if (typeof tv === 'number' && !isFinite(tv)) {
                  return null;
              }
              // 4. Let toISO be the result of calling the [[Get]] internal method of
              // O with argument "toISOString".
              var toISO = O.toISOString;
              // 5. If IsCallable(toISO) is false, throw a TypeError exception.
              if (!isCallable(toISO)) {
                  throw new TypeError('toISOString property is not callable');
              }
              // 6. Return the result of calling the [[Call]] internal method of
              //  toISO with O as the this value and an empty argument list.
              return toISO.call(O);
  
              // NOTE 1 The argument is ignored.
  
              // NOTE 2 The toJSON function is intentionally generic; it does not
              // require that its this value be a Date object. Therefore, it can be
              // transferred to other kinds of objects for use as a method. However,
              // it does require that any such object have a toISOString method. An
              // object is free to use the argument key to filter its
              // stringification.
          };
      }
  
      // ES5 15.9.4.2
      // http://es5.github.com/#x15.9.4.2
      // based on work shared by Daniel Friesen (dantman)
      // http://gist.github.com/303249
      var supportsExtendedYears = Date.parse('+033658-09-27T01:46:40.000Z') === 1e15;
      var acceptsInvalidDates = !isNaN(Date.parse('2012-04-04T24:00:00.500Z')) || !isNaN(Date.parse('2012-11-31T23:59:59.000Z')) || !isNaN(Date.parse('2012-12-31T23:59:60.000Z'));
      var doesNotParseY2KNewYear = isNaN(Date.parse('2000-01-01T00:00:00.000Z'));
      if (doesNotParseY2KNewYear || acceptsInvalidDates || !supportsExtendedYears) {
          // XXX global assignment won't work in embeddings that use
          // an alternate object for the context.
          /* global Date: true */
          /* eslint-disable no-undef */
          var maxSafeUnsigned32Bit = Math.pow(2, 31) - 1;
          var hasSafariSignedIntBug = isActualNaN(new Date(1970, 0, 1, 0, 0, 0, maxSafeUnsigned32Bit + 1).getTime());
          /* eslint-disable no-implicit-globals */
          Date = (function (NativeDate) {
          /* eslint-enable no-implicit-globals */
          /* eslint-enable no-undef */
              // Date.length === 7
              var DateShim = function Date(Y, M, D, h, m, s, ms) {
                  var length = arguments.length;
                  var date;
                  if (this instanceof NativeDate) {
                      var seconds = s;
                      var millis = ms;
                      if (hasSafariSignedIntBug && length >= 7 && ms > maxSafeUnsigned32Bit) {
                          // work around a Safari 8/9 bug where it treats the seconds as signed
                          var msToShift = Math.floor(ms / maxSafeUnsigned32Bit) * maxSafeUnsigned32Bit;
                          var sToShift = Math.floor(msToShift / 1e3);
                          seconds += sToShift;
                          millis -= sToShift * 1e3;
                      }
                      date = length === 1 && $String(Y) === Y ? // isString(Y)
                          // We explicitly pass it through parse:
                          new NativeDate(DateShim.parse(Y)) :
                          // We have to manually make calls depending on argument
                          // length here
                          length >= 7 ? new NativeDate(Y, M, D, h, m, seconds, millis) :
                          length >= 6 ? new NativeDate(Y, M, D, h, m, seconds) :
                          length >= 5 ? new NativeDate(Y, M, D, h, m) :
                          length >= 4 ? new NativeDate(Y, M, D, h) :
                          length >= 3 ? new NativeDate(Y, M, D) :
                          length >= 2 ? new NativeDate(Y, M) :
                          length >= 1 ? new NativeDate(Y instanceof NativeDate ? +Y : Y) :
                                        new NativeDate();
                  } else {
                      date = NativeDate.apply(this, arguments);
                  }
                  if (!isPrimitive(date)) {
                      // Prevent mixups with unfixed Date object
                      defineProperties(date, { constructor: DateShim }, true);
                  }
                  return date;
              };
  
              // 15.9.1.15 Date Time String Format.
              var isoDateExpression = new RegExp('^' +
                  '(\\d{4}|[+-]\\d{6})' + // four-digit year capture or sign +
                                            // 6-digit extended year
                  '(?:-(\\d{2})' + // optional month capture
                  '(?:-(\\d{2})' + // optional day capture
                  '(?:' + // capture hours:minutes:seconds.milliseconds
                      'T(\\d{2})' + // hours capture
                      ':(\\d{2})' + // minutes capture
                      '(?:' + // optional :seconds.milliseconds
                          ':(\\d{2})' + // seconds capture
                          '(?:(\\.\\d{1,}))?' + // milliseconds capture
                      ')?' +
                  '(' + // capture UTC offset component
                      'Z|' + // UTC capture
                      '(?:' + // offset specifier +/-hours:minutes
                          '([-+])' + // sign capture
                          '(\\d{2})' + // hours offset capture
                          ':(\\d{2})' + // minutes offset capture
                      ')' +
                  ')?)?)?)?' +
              '$');
  
              var months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365];
  
              var dayFromMonth = function dayFromMonth(year, month) {
                  var t = month > 1 ? 1 : 0;
                  return (
                      months[month] +
                      Math.floor((year - 1969 + t) / 4) -
                      Math.floor((year - 1901 + t) / 100) +
                      Math.floor((year - 1601 + t) / 400) +
                      365 * (year - 1970)
                  );
              };
  
              var toUTC = function toUTC(t) {
                  var s = 0;
                  var ms = t;
                  if (hasSafariSignedIntBug && ms > maxSafeUnsigned32Bit) {
                      // work around a Safari 8/9 bug where it treats the seconds as signed
                      var msToShift = Math.floor(ms / maxSafeUnsigned32Bit) * maxSafeUnsigned32Bit;
                      var sToShift = Math.floor(msToShift / 1e3);
                      s += sToShift;
                      ms -= sToShift * 1e3;
                  }
                  return $Number(new NativeDate(1970, 0, 1, 0, 0, s, ms));
              };
  
              // Copy any custom methods a 3rd party library may have added
              for (var key in NativeDate) {
                  if (owns(NativeDate, key)) {
                      DateShim[key] = NativeDate[key];
                  }
              }
  
              // Copy "native" methods explicitly; they may be non-enumerable
              defineProperties(DateShim, {
                  now: NativeDate.now,
                  UTC: NativeDate.UTC
              }, true);
              DateShim.prototype = NativeDate.prototype;
              defineProperties(DateShim.prototype, {
                  constructor: DateShim
              }, true);
  
              // Upgrade Date.parse to handle simplified ISO 8601 strings
              var parseShim = function parse(string) {
                  var match = isoDateExpression.exec(string);
                  if (match) {
                      // parse months, days, hours, minutes, seconds, and milliseconds
                      // provide default values if necessary
                      // parse the UTC offset component
                      var year = $Number(match[1]),
                          month = $Number(match[2] || 1) - 1,
                          day = $Number(match[3] || 1) - 1,
                          hour = $Number(match[4] || 0),
                          minute = $Number(match[5] || 0),
                          second = $Number(match[6] || 0),
                          millisecond = Math.floor($Number(match[7] || 0) * 1000),
                          // When time zone is missed, local offset should be used
                          // (ES 5.1 bug)
                          // see https://bugs.ecmascript.org/show_bug.cgi?id=112
                          isLocalTime = Boolean(match[4] && !match[8]),
                          signOffset = match[9] === '-' ? 1 : -1,
                          hourOffset = $Number(match[10] || 0),
                          minuteOffset = $Number(match[11] || 0),
                          result;
                      var hasMinutesOrSecondsOrMilliseconds = minute > 0 || second > 0 || millisecond > 0;
                      if (
                          hour < (hasMinutesOrSecondsOrMilliseconds ? 24 : 25) &&
                          minute < 60 && second < 60 && millisecond < 1000 &&
                          month > -1 && month < 12 && hourOffset < 24 &&
                          minuteOffset < 60 && // detect invalid offsets
                          day > -1 &&
                          day < (dayFromMonth(year, month + 1) - dayFromMonth(year, month))
                      ) {
                          result = (
                              (dayFromMonth(year, month) + day) * 24 +
                              hour +
                              hourOffset * signOffset
                          ) * 60;
                          result = (
                              (result + minute + minuteOffset * signOffset) * 60 +
                              second
                          ) * 1000 + millisecond;
                          if (isLocalTime) {
                              result = toUTC(result);
                          }
                          if (-8.64e15 <= result && result <= 8.64e15) {
                              return result;
                          }
                      }
                      return NaN;
                  }
                  return NativeDate.parse.apply(this, arguments);
              };
              defineProperties(DateShim, { parse: parseShim });
  
              return DateShim;
          }(Date));
          /* global Date: false */
      }
  
      // ES5 15.9.4.4
      // http://es5.github.com/#x15.9.4.4
      if (!Date.now) {
          Date.now = function now() {
              return new Date().getTime();
          };
      }
  
      //
      // Number
      // ======
      //
  
      // ES5.1 15.7.4.5
      // http://es5.github.com/#x15.7.4.5
      var hasToFixedBugs = NumberPrototype.toFixed && (
        (0.00008).toFixed(3) !== '0.000' ||
        (0.9).toFixed(0) !== '1' ||
        (1.255).toFixed(2) !== '1.25' ||
        (1000000000000000128).toFixed(0) !== '1000000000000000128'
      );
  
      var toFixedHelpers = {
          base: 1e7,
          size: 6,
          data: [0, 0, 0, 0, 0, 0],
          multiply: function multiply(n, c) {
              var i = -1;
              var c2 = c;
              while (++i < toFixedHelpers.size) {
                  c2 += n * toFixedHelpers.data[i];
                  toFixedHelpers.data[i] = c2 % toFixedHelpers.base;
                  c2 = Math.floor(c2 / toFixedHelpers.base);
              }
          },
          divide: function divide(n) {
              var i = toFixedHelpers.size;
              var c = 0;
              while (--i >= 0) {
                  c += toFixedHelpers.data[i];
                  toFixedHelpers.data[i] = Math.floor(c / n);
                  c = (c % n) * toFixedHelpers.base;
              }
          },
          numToString: function numToString() {
              var i = toFixedHelpers.size;
              var s = '';
              while (--i >= 0) {
                  if (s !== '' || i === 0 || toFixedHelpers.data[i] !== 0) {
                      var t = $String(toFixedHelpers.data[i]);
                      if (s === '') {
                          s = t;
                      } else {
                          s += strSlice('0000000', 0, 7 - t.length) + t;
                      }
                  }
              }
              return s;
          },
          pow: function pow(x, n, acc) {
              return (n === 0 ? acc : (n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc)));
          },
          log: function log(x) {
              var n = 0;
              var x2 = x;
              while (x2 >= 4096) {
                  n += 12;
                  x2 /= 4096;
              }
              while (x2 >= 2) {
                  n += 1;
                  x2 /= 2;
              }
              return n;
          }
      };
  
      var toFixedShim = function toFixed(fractionDigits) {
          var f, x, s, m, e, z, j, k;
  
          // Test for NaN and round fractionDigits down
          f = $Number(fractionDigits);
          f = isActualNaN(f) ? 0 : Math.floor(f);
  
          if (f < 0 || f > 20) {
              throw new RangeError('Number.toFixed called with invalid number of decimals');
          }
  
          x = $Number(this);
  
          if (isActualNaN(x)) {
              return 'NaN';
          }
  
          // If it is too big or small, return the string value of the number
          if (x <= -1e21 || x >= 1e21) {
              return $String(x);
          }
  
          s = '';
  
          if (x < 0) {
              s = '-';
              x = -x;
          }
  
          m = '0';
  
          if (x > 1e-21) {
              // 1e-21 < x < 1e21
              // -70 < log2(x) < 70
              e = toFixedHelpers.log(x * toFixedHelpers.pow(2, 69, 1)) - 69;
              z = (e < 0 ? x * toFixedHelpers.pow(2, -e, 1) : x / toFixedHelpers.pow(2, e, 1));
              z *= 0x10000000000000; // Math.pow(2, 52);
              e = 52 - e;
  
              // -18 < e < 122
              // x = z / 2 ^ e
              if (e > 0) {
                  toFixedHelpers.multiply(0, z);
                  j = f;
  
                  while (j >= 7) {
                      toFixedHelpers.multiply(1e7, 0);
                      j -= 7;
                  }
  
                  toFixedHelpers.multiply(toFixedHelpers.pow(10, j, 1), 0);
                  j = e - 1;
  
                  while (j >= 23) {
                      toFixedHelpers.divide(1 << 23);
                      j -= 23;
                  }
  
                  toFixedHelpers.divide(1 << j);
                  toFixedHelpers.multiply(1, 1);
                  toFixedHelpers.divide(2);
                  m = toFixedHelpers.numToString();
              } else {
                  toFixedHelpers.multiply(0, z);
                  toFixedHelpers.multiply(1 << (-e), 0);
                  m = toFixedHelpers.numToString() + strSlice('0.00000000000000000000', 2, 2 + f);
              }
          }
  
          if (f > 0) {
              k = m.length;
  
              if (k <= f) {
                  m = s + strSlice('0.0000000000000000000', 0, f - k + 2) + m;
              } else {
                  m = s + strSlice(m, 0, k - f) + '.' + strSlice(m, k - f);
              }
          } else {
              m = s + m;
          }
  
          return m;
      };
      defineProperties(NumberPrototype, { toFixed: toFixedShim }, hasToFixedBugs);
  
      var hasToPrecisionUndefinedBug = (function () {
          try {
              return 1.0.toPrecision(undefined) === '1';
          } catch (e) {
              return true;
          }
      }());
      var originalToPrecision = NumberPrototype.toPrecision;
      defineProperties(NumberPrototype, {
          toPrecision: function toPrecision(precision) {
              return typeof precision === 'undefined' ? originalToPrecision.call(this) : originalToPrecision.call(this, precision);
          }
      }, hasToPrecisionUndefinedBug);
  
      //
      // String
      // ======
      //
  
      // ES5 15.5.4.14
      // http://es5.github.com/#x15.5.4.14
  
      // [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers]
      // Many browsers do not split properly with regular expressions or they
      // do not perform the split correctly under obscure conditions.
      // See http://blog.stevenlevithan.com/archives/cross-browser-split
      // I've tested in many browsers and this seems to cover the deviant ones:
      //    'ab'.split(/(?:ab)*/) should be ["", ""], not [""]
      //    '.'.split(/(.?)(.?)/) should be ["", ".", "", ""], not ["", ""]
      //    'tesst'.split(/(s)*/) should be ["t", undefined, "e", "s", "t"], not
      //       [undefined, "t", undefined, "e", ...]
      //    ''.split(/.?/) should be [], not [""]
      //    '.'.split(/()()/) should be ["."], not ["", "", "."]
  
      if (
          'ab'.split(/(?:ab)*/).length !== 2 ||
          '.'.split(/(.?)(.?)/).length !== 4 ||
          'tesst'.split(/(s)*/)[1] === 't' ||
          'test'.split(/(?:)/, -1).length !== 4 ||
          ''.split(/.?/).length ||
          '.'.split(/()()/).length > 1
      ) {
          (function () {
              var compliantExecNpcg = typeof (/()??/).exec('')[1] === 'undefined'; // NPCG: nonparticipating capturing group
              var maxSafe32BitInt = Math.pow(2, 32) - 1;
  
              StringPrototype.split = function (separator, limit) {
                  var string = String(this);
                  if (typeof separator === 'undefined' && limit === 0) {
                      return [];
                  }
  
                  // If `separator` is not a regex, use native split
                  if (!isRegex(separator)) {
                      return strSplit(this, separator, limit);
                  }
  
                  var output = [];
                  var flags = (separator.ignoreCase ? 'i' : '') +
                              (separator.multiline ? 'm' : '') +
                              (separator.unicode ? 'u' : '') + // in ES6
                              (separator.sticky ? 'y' : ''), // Firefox 3+ and ES6
                      lastLastIndex = 0,
                      // Make `global` and avoid `lastIndex` issues by working with a copy
                      separator2, match, lastIndex, lastLength;
                  var separatorCopy = new RegExp(separator.source, flags + 'g');
                  if (!compliantExecNpcg) {
                      // Doesn't need flags gy, but they don't hurt
                      separator2 = new RegExp('^' + separatorCopy.source + '$(?!\\s)', flags);
                  }
                  /* Values for `limit`, per the spec:
                   * If undefined: 4294967295 // maxSafe32BitInt
                   * If 0, Infinity, or NaN: 0
                   * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
                   * If negative number: 4294967296 - Math.floor(Math.abs(limit))
                   * If other: Type-convert, then use the above rules
                   */
                  var splitLimit = typeof limit === 'undefined' ? maxSafe32BitInt : ES.ToUint32(limit);
                  match = separatorCopy.exec(string);
                  while (match) {
                      // `separatorCopy.lastIndex` is not reliable cross-browser
                      lastIndex = match.index + match[0].length;
                      if (lastIndex > lastLastIndex) {
                          pushCall(output, strSlice(string, lastLastIndex, match.index));
                          // Fix browsers whose `exec` methods don't consistently return `undefined` for
                          // nonparticipating capturing groups
                          if (!compliantExecNpcg && match.length > 1) {
                              /* eslint-disable no-loop-func */
                              match[0].replace(separator2, function () {
                                  for (var i = 1; i < arguments.length - 2; i++) {
                                      if (typeof arguments[i] === 'undefined') {
                                          match[i] = void 0;
                                      }
                                  }
                              });
                              /* eslint-enable no-loop-func */
                          }
                          if (match.length > 1 && match.index < string.length) {
                              array_push.apply(output, arraySlice(match, 1));
                          }
                          lastLength = match[0].length;
                          lastLastIndex = lastIndex;
                          if (output.length >= splitLimit) {
                              break;
                          }
                      }
                      if (separatorCopy.lastIndex === match.index) {
                          separatorCopy.lastIndex++; // Avoid an infinite loop
                      }
                      match = separatorCopy.exec(string);
                  }
                  if (lastLastIndex === string.length) {
                      if (lastLength || !separatorCopy.test('')) {
                          pushCall(output, '');
                      }
                  } else {
                      pushCall(output, strSlice(string, lastLastIndex));
                  }
                  return output.length > splitLimit ? arraySlice(output, 0, splitLimit) : output;
              };
          }());
  
      // [bugfix, chrome]
      // If separator is undefined, then the result array contains just one String,
      // which is the this value (converted to a String). If limit is not undefined,
      // then the output array is truncated so that it contains no more than limit
      // elements.
      // "0".split(undefined, 0) -> []
      } else if ('0'.split(void 0, 0).length) {
          StringPrototype.split = function split(separator, limit) {
              if (typeof separator === 'undefined' && limit === 0) {
                  return [];
              }
              return strSplit(this, separator, limit);
          };
      }
  
      var str_replace = StringPrototype.replace;
      var replaceReportsGroupsCorrectly = (function () {
          var groups = [];
          'x'.replace(/x(.)?/g, function (match, group) {
              pushCall(groups, group);
          });
          return groups.length === 1 && typeof groups[0] === 'undefined';
      }());
  
      if (!replaceReportsGroupsCorrectly) {
          StringPrototype.replace = function replace(searchValue, replaceValue) {
              var isFn = isCallable(replaceValue);
              var hasCapturingGroups = isRegex(searchValue) && (/\)[*?]/).test(searchValue.source);
              if (!isFn || !hasCapturingGroups) {
                  return str_replace.call(this, searchValue, replaceValue);
              } else {
                  var wrappedReplaceValue = function (match) {
                      var length = arguments.length;
                      var originalLastIndex = searchValue.lastIndex;
                      searchValue.lastIndex = 0;
                      var args = searchValue.exec(match) || [];
                      searchValue.lastIndex = originalLastIndex;
                      pushCall(args, arguments[length - 2], arguments[length - 1]);
                      return replaceValue.apply(this, args);
                  };
                  return str_replace.call(this, searchValue, wrappedReplaceValue);
              }
          };
      }
  
      // ECMA-262, 3rd B.2.3
      // Not an ECMAScript standard, although ECMAScript 3rd Edition has a
      // non-normative section suggesting uniform semantics and it should be
      // normalized across all browsers
      // [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE
      var string_substr = StringPrototype.substr;
      var hasNegativeSubstrBug = ''.substr && '0b'.substr(-1) !== 'b';
      defineProperties(StringPrototype, {
          substr: function substr(start, length) {
              var normalizedStart = start;
              if (start < 0) {
                  normalizedStart = max(this.length + start, 0);
              }
              return string_substr.call(this, normalizedStart, length);
          }
      }, hasNegativeSubstrBug);
  
      // ES5 15.5.4.20
      // whitespace from: http://es5.github.io/#x15.5.4.20
      var ws = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003' +
          '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028' +
          '\u2029\uFEFF';
      var zeroWidth = '\u200b';
      var wsRegexChars = '[' + ws + ']';
      var trimBeginRegexp = new RegExp('^' + wsRegexChars + wsRegexChars + '*');
      var trimEndRegexp = new RegExp(wsRegexChars + wsRegexChars + '*$');
      var hasTrimWhitespaceBug = StringPrototype.trim && (ws.trim() || !zeroWidth.trim());
      defineProperties(StringPrototype, {
          // http://blog.stevenlevithan.com/archives/faster-trim-javascript
          // http://perfectionkills.com/whitespace-deviations/
          trim: function trim() {
              if (typeof this === 'undefined' || this === null) {
                  throw new TypeError("can't convert " + this + ' to object');
              }
              return $String(this).replace(trimBeginRegexp, '').replace(trimEndRegexp, '');
          }
      }, hasTrimWhitespaceBug);
      var trim = call.bind(String.prototype.trim);
  
      var hasLastIndexBug = StringPrototype.lastIndexOf && 'abcあい'.lastIndexOf('あい', 2) !== -1;
      defineProperties(StringPrototype, {
          lastIndexOf: function lastIndexOf(searchString) {
              if (typeof this === 'undefined' || this === null) {
                  throw new TypeError("can't convert " + this + ' to object');
              }
              var S = $String(this);
              var searchStr = $String(searchString);
              var numPos = arguments.length > 1 ? $Number(arguments[1]) : NaN;
              var pos = isActualNaN(numPos) ? Infinity : ES.ToInteger(numPos);
              var start = min(max(pos, 0), S.length);
              var searchLen = searchStr.length;
              var k = start + searchLen;
              while (k > 0) {
                  k = max(0, k - searchLen);
                  var index = strIndexOf(strSlice(S, k, start + searchLen), searchStr);
                  if (index !== -1) {
                      return k + index;
                  }
              }
              return -1;
          }
      }, hasLastIndexBug);
  
      var originalLastIndexOf = StringPrototype.lastIndexOf;
      defineProperties(StringPrototype, {
          lastIndexOf: function lastIndexOf(searchString) {
              return originalLastIndexOf.apply(this, arguments);
          }
      }, StringPrototype.lastIndexOf.length !== 1);
  
      // ES-5 15.1.2.2
      /* eslint-disable radix */
      if (parseInt(ws + '08') !== 8 || parseInt(ws + '0x16') !== 22) {
      /* eslint-enable radix */
          /* global parseInt: true */
          parseInt = (function (origParseInt) {
              var hexRegex = /^[\-+]?0[xX]/;
              return function parseInt(str, radix) {
                  var string = trim(String(str));
                  var defaultedRadix = $Number(radix) || (hexRegex.test(string) ? 16 : 10);
                  return origParseInt(string, defaultedRadix);
              };
          }(parseInt));
      }
  
      // https://es5.github.io/#x15.1.2.3
      if (1 / parseFloat('-0') !== -Infinity) {
          /* global parseFloat: true */
          parseFloat = (function (origParseFloat) {
              return function parseFloat(string) {
                  var inputString = trim(String(string));
                  var result = origParseFloat(inputString);
                  return result === 0 && strSlice(inputString, 0, 1) === '-' ? -0 : result;
              };
          }(parseFloat));
      }
  
      if (String(new RangeError('test')) !== 'RangeError: test') {
          var errorToStringShim = function toString() {
              if (typeof this === 'undefined' || this === null) {
                  throw new TypeError("can't convert " + this + ' to object');
              }
              var name = this.name;
              if (typeof name === 'undefined') {
                  name = 'Error';
              } else if (typeof name !== 'string') {
                  name = $String(name);
              }
              var msg = this.message;
              if (typeof msg === 'undefined') {
                  msg = '';
              } else if (typeof msg !== 'string') {
                  msg = $String(msg);
              }
              if (!name) {
                  return msg;
              }
              if (!msg) {
                  return name;
              }
              return name + ': ' + msg;
          };
          // can't use defineProperties here because of toString enumeration issue in IE <= 8
          Error.prototype.toString = errorToStringShim;
      }
  
      if (supportsDescriptors) {
          var ensureNonEnumerable = function (obj, prop) {
              if (isEnum(obj, prop)) {
                  var desc = Object.getOwnPropertyDescriptor(obj, prop);
                  if (desc.configurable) {
                      desc.enumerable = false;
                      Object.defineProperty(obj, prop, desc);
                  }
              }
          };
          ensureNonEnumerable(Error.prototype, 'message');
          if (Error.prototype.message !== '') {
              Error.prototype.message = '';
          }
          ensureNonEnumerable(Error.prototype, 'name');
      }
  
      if (String(/a/mig) !== '/a/gim') {
          var regexToString = function toString() {
              var str = '/' + this.source + '/';
              if (this.global) {
                  str += 'g';
              }
              if (this.ignoreCase) {
                  str += 'i';
              }
              if (this.multiline) {
                  str += 'm';
              }
              return str;
          };
          // can't use defineProperties here because of toString enumeration issue in IE <= 8
          RegExp.prototype.toString = regexToString;
      }
  }));
  
  /*!
   * https://github.com/es-shims/es5-shim
   * @license es5-shim Copyright 2009-2015 by contributors, MIT License
   * see https://github.com/es-shims/es5-shim/blob/master/LICENSE
   */
  
  // vim: ts=4 sts=4 sw=4 expandtab
  
  // Add semicolon to prevent IIFE from being passed as argument to concatenated code.
  ;
  
  // UMD (Universal Module Definition)
  // see https://github.com/umdjs/umd/blob/master/templates/returnExports.js
  (function (root, factory) {
      'use strict';
  
      /* global define, exports, module */
      if (typeof define === 'function' && define.amd) {
          // AMD. Register as an anonymous module.
          define(factory);
      } else if (typeof exports === 'object') {
          // Node. Does not work with strict CommonJS, but
          // only CommonJS-like enviroments that support module.exports,
          // like Node.
          module.exports = factory();
      } else {
          // Browser globals (root is window)
          root.returnExports = factory();
      }
  }(this, function () {
  
      var call = Function.call;
      var prototypeOfObject = Object.prototype;
      var owns = call.bind(prototypeOfObject.hasOwnProperty);
      var isEnumerable = call.bind(prototypeOfObject.propertyIsEnumerable);
      var toStr = call.bind(prototypeOfObject.toString);
  
      // If JS engine supports accessors creating shortcuts.
      var defineGetter;
      var defineSetter;
      var lookupGetter;
      var lookupSetter;
      var supportsAccessors = owns(prototypeOfObject, '__defineGetter__');
      if (supportsAccessors) {
          /* eslint-disable no-underscore-dangle */
          defineGetter = call.bind(prototypeOfObject.__defineGetter__);
          defineSetter = call.bind(prototypeOfObject.__defineSetter__);
          lookupGetter = call.bind(prototypeOfObject.__lookupGetter__);
          lookupSetter = call.bind(prototypeOfObject.__lookupSetter__);
          /* eslint-enable no-underscore-dangle */
      }
  
      var isPrimitive = function isPrimitive(o) {
          return o == null || (typeof o !== 'object' && typeof o !== 'function');
      };
  
      // ES5 15.2.3.2
      // http://es5.github.com/#x15.2.3.2
      if (!Object.getPrototypeOf) {
          // https://github.com/es-shims/es5-shim/issues#issue/2
          // http://ejohn.org/blog/objectgetprototypeof/
          // recommended by fschaefer on github
          //
          // sure, and webreflection says ^_^
          // ... this will nerever possibly return null
          // ... Opera Mini breaks here with infinite loops
          Object.getPrototypeOf = function getPrototypeOf(object) {
              /* eslint-disable no-proto */
              var proto = object.__proto__;
              /* eslint-enable no-proto */
              if (proto || proto === null) {
                  return proto;
              } else if (toStr(object.constructor) === '[object Function]') {
                  return object.constructor.prototype;
              } else if (object instanceof Object) {
                  return prototypeOfObject;
              } else {
                  // Correctly return null for Objects created with `Object.create(null)`
                  // (shammed or native) or `{ __proto__: null}`.  Also returns null for
                  // cross-realm objects on browsers that lack `__proto__` support (like
                  // IE <11), but that's the best we can do.
                  return null;
              }
          };
      }
  
      // ES5 15.2.3.3
      // http://es5.github.com/#x15.2.3.3
  
      var doesGetOwnPropertyDescriptorWork = function doesGetOwnPropertyDescriptorWork(object) {
          try {
              object.sentinel = 0;
              return Object.getOwnPropertyDescriptor(object, 'sentinel').value === 0;
          } catch (exception) {
              return false;
          }
      };
  
      // check whether getOwnPropertyDescriptor works if it's given. Otherwise, shim partially.
      if (Object.defineProperty) {
          var getOwnPropertyDescriptorWorksOnObject = doesGetOwnPropertyDescriptorWork({});
          var getOwnPropertyDescriptorWorksOnDom = typeof document === 'undefined' ||
          doesGetOwnPropertyDescriptorWork(document.createElement('div'));
          if (!getOwnPropertyDescriptorWorksOnDom || !getOwnPropertyDescriptorWorksOnObject) {
              var getOwnPropertyDescriptorFallback = Object.getOwnPropertyDescriptor;
          }
      }
  
      if (!Object.getOwnPropertyDescriptor || getOwnPropertyDescriptorFallback) {
          var ERR_NON_OBJECT = 'Object.getOwnPropertyDescriptor called on a non-object: ';
  
          /* eslint-disable no-proto */
          Object.getOwnPropertyDescriptor = function getOwnPropertyDescriptor(object, property) {
              if (isPrimitive(object)) {
                  throw new TypeError(ERR_NON_OBJECT + object);
              }
  
              // make a valiant attempt to use the real getOwnPropertyDescriptor
              // for I8's DOM elements.
              if (getOwnPropertyDescriptorFallback) {
                  try {
                      return getOwnPropertyDescriptorFallback.call(Object, object, property);
                  } catch (exception) {
                      // try the shim if the real one doesn't work
                  }
              }
  
              var descriptor;
  
              // If object does not owns property return undefined immediately.
              if (!owns(object, property)) {
                  return descriptor;
              }
  
              // If object has a property then it's for sure `configurable`, and
              // probably `enumerable`. Detect enumerability though.
              descriptor = {
                  enumerable: isEnumerable(object, property),
                  configurable: true
              };
  
              // If JS engine supports accessor properties then property may be a
              // getter or setter.
              if (supportsAccessors) {
                  // Unfortunately `__lookupGetter__` will return a getter even
                  // if object has own non getter property along with a same named
                  // inherited getter. To avoid misbehavior we temporary remove
                  // `__proto__` so that `__lookupGetter__` will return getter only
                  // if it's owned by an object.
                  var prototype = object.__proto__;
                  var notPrototypeOfObject = object !== prototypeOfObject;
                  // avoid recursion problem, breaking in Opera Mini when
                  // Object.getOwnPropertyDescriptor(Object.prototype, 'toString')
                  // or any other Object.prototype accessor
                  if (notPrototypeOfObject) {
                      object.__proto__ = prototypeOfObject;
                  }
  
                  var getter = lookupGetter(object, property);
                  var setter = lookupSetter(object, property);
  
                  if (notPrototypeOfObject) {
                      // Once we have getter and setter we can put values back.
                      object.__proto__ = prototype;
                  }
  
                  if (getter || setter) {
                      if (getter) {
                          descriptor.get = getter;
                      }
                      if (setter) {
                          descriptor.set = setter;
                      }
                      // If it was accessor property we're done and return here
                      // in order to avoid adding `value` to the descriptor.
                      return descriptor;
                  }
              }
  
              // If we got this far we know that object has an own property that is
              // not an accessor so we set it as a value and return descriptor.
              descriptor.value = object[property];
              descriptor.writable = true;
              return descriptor;
          };
          /* eslint-enable no-proto */
      }
  
      // ES5 15.2.3.4
      // http://es5.github.com/#x15.2.3.4
      if (!Object.getOwnPropertyNames) {
          Object.getOwnPropertyNames = function getOwnPropertyNames(object) {
              return Object.keys(object);
          };
      }
  
      // ES5 15.2.3.5
      // http://es5.github.com/#x15.2.3.5
      if (!Object.create) {
  
          // Contributed by Brandon Benvie, October, 2012
          var createEmpty;
          var supportsProto = !({ __proto__: null } instanceof Object);
                              // the following produces false positives
                              // in Opera Mini => not a reliable check
                              // Object.prototype.__proto__ === null
  
          // Check for document.domain and active x support
          // No need to use active x approach when document.domain is not set
          // see https://github.com/es-shims/es5-shim/issues/150
          // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
          /* global ActiveXObject */
          var shouldUseActiveX = function shouldUseActiveX() {
              // return early if document.domain not set
              if (!document.domain) {
                  return false;
              }
  
              try {
                  return !!new ActiveXObject('htmlfile');
              } catch (exception) {
                  return false;
              }
          };
  
          // This supports IE8 when document.domain is used
          // see https://github.com/es-shims/es5-shim/issues/150
          // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
          var getEmptyViaActiveX = function getEmptyViaActiveX() {
              var empty;
              var xDoc;
  
              xDoc = new ActiveXObject('htmlfile');
  
              var script = 'script';
              xDoc.write('<' + script + '></' + script + '>');
              xDoc.close();
  
              empty = xDoc.parentWindow.Object.prototype;
              xDoc = null;
  
              return empty;
          };
  
          // The original implementation using an iframe
          // before the activex approach was added
          // see https://github.com/es-shims/es5-shim/issues/150
          var getEmptyViaIFrame = function getEmptyViaIFrame() {
              var iframe = document.createElement('iframe');
              var parent = document.body || document.documentElement;
              var empty;
  
              iframe.style.display = 'none';
              parent.appendChild(iframe);
              /* eslint-disable no-script-url */
              iframe.src = 'javascript:';
              /* eslint-enable no-script-url */
  
              empty = iframe.contentWindow.Object.prototype;
              parent.removeChild(iframe);
              iframe = null;
  
              return empty;
          };
  
          /* global document */
          if (supportsProto || typeof document === 'undefined') {
              createEmpty = function () {
                  return { __proto__: null };
              };
          } else {
              // In old IE __proto__ can't be used to manually set `null`, nor does
              // any other method exist to make an object that inherits from nothing,
              // aside from Object.prototype itself. Instead, create a new global
              // object and *steal* its Object.prototype and strip it bare. This is
              // used as the prototype to create nullary objects.
              createEmpty = function () {
                  // Determine which approach to use
                  // see https://github.com/es-shims/es5-shim/issues/150
                  var empty = shouldUseActiveX() ? getEmptyViaActiveX() : getEmptyViaIFrame();
  
                  delete empty.constructor;
                  delete empty.hasOwnProperty;
                  delete empty.propertyIsEnumerable;
                  delete empty.isPrototypeOf;
                  delete empty.toLocaleString;
                  delete empty.toString;
                  delete empty.valueOf;
  
                  var Empty = function Empty() {};
                  Empty.prototype = empty;
                  // short-circuit future calls
                  createEmpty = function () {
                      return new Empty();
                  };
                  return new Empty();
              };
          }
  
          Object.create = function create(prototype, properties) {
  
              var object;
              var Type = function Type() {}; // An empty constructor.
  
              if (prototype === null) {
                  object = createEmpty();
              } else {
                  if (prototype !== null && isPrimitive(prototype)) {
                      // In the native implementation `parent` can be `null`
                      // OR *any* `instanceof Object`  (Object|Function|Array|RegExp|etc)
                      // Use `typeof` tho, b/c in old IE, DOM elements are not `instanceof Object`
                      // like they are in modern browsers. Using `Object.create` on DOM elements
                      // is...err...probably inappropriate, but the native version allows for it.
                      throw new TypeError('Object prototype may only be an Object or null'); // same msg as Chrome
                  }
                  Type.prototype = prototype;
                  object = new Type();
                  // IE has no built-in implementation of `Object.getPrototypeOf`
                  // neither `__proto__`, but this manually setting `__proto__` will
                  // guarantee that `Object.getPrototypeOf` will work as expected with
                  // objects created using `Object.create`
                  /* eslint-disable no-proto */
                  object.__proto__ = prototype;
                  /* eslint-enable no-proto */
              }
  
              if (properties !== void 0) {
                  Object.defineProperties(object, properties);
              }
  
              return object;
          };
      }
  
      // ES5 15.2.3.6
      // http://es5.github.com/#x15.2.3.6
  
      // Patch for WebKit and IE8 standard mode
      // Designed by hax <hax.github.com>
      // related issue: https://github.com/es-shims/es5-shim/issues#issue/5
      // IE8 Reference:
      //     http://msdn.microsoft.com/en-us/library/dd282900.aspx
      //     http://msdn.microsoft.com/en-us/library/dd229916.aspx
      // WebKit Bugs:
      //     https://bugs.webkit.org/show_bug.cgi?id=36423
  
      var doesDefinePropertyWork = function doesDefinePropertyWork(object) {
          try {
              Object.defineProperty(object, 'sentinel', {});
              return 'sentinel' in object;
          } catch (exception) {
              return false;
          }
      };
  
      // check whether defineProperty works if it's given. Otherwise,
      // shim partially.
      if (Object.defineProperty) {
          var definePropertyWorksOnObject = doesDefinePropertyWork({});
          var definePropertyWorksOnDom = typeof document === 'undefined' ||
              doesDefinePropertyWork(document.createElement('div'));
          if (!definePropertyWorksOnObject || !definePropertyWorksOnDom) {
              var definePropertyFallback = Object.defineProperty,
                  definePropertiesFallback = Object.defineProperties;
          }
      }
  
      if (!Object.defineProperty || definePropertyFallback) {
          var ERR_NON_OBJECT_DESCRIPTOR = 'Property description must be an object: ';
          var ERR_NON_OBJECT_TARGET = 'Object.defineProperty called on non-object: ';
          var ERR_ACCESSORS_NOT_SUPPORTED = 'getters & setters can not be defined on this javascript engine';
  
          Object.defineProperty = function defineProperty(object, property, descriptor) {
              if (isPrimitive(object)) {
                  throw new TypeError(ERR_NON_OBJECT_TARGET + object);
              }
              if (isPrimitive(descriptor)) {
                  throw new TypeError(ERR_NON_OBJECT_DESCRIPTOR + descriptor);
              }
              // make a valiant attempt to use the real defineProperty
              // for I8's DOM elements.
              if (definePropertyFallback) {
                  try {
                      return definePropertyFallback.call(Object, object, property, descriptor);
                  } catch (exception) {
                      // try the shim if the real one doesn't work
                  }
              }
  
              // If it's a data property.
              if ('value' in descriptor) {
                  // fail silently if 'writable', 'enumerable', or 'configurable'
                  // are requested but not supported
                  /*
                  // alternate approach:
                  if ( // can't implement these features; allow false but not true
                      ('writable' in descriptor && !descriptor.writable) ||
                      ('enumerable' in descriptor && !descriptor.enumerable) ||
                      ('configurable' in descriptor && !descriptor.configurable)
                  ))
                      throw new RangeError(
                          'This implementation of Object.defineProperty does not support configurable, enumerable, or writable.'
                      );
                  */
  
                  if (supportsAccessors && (lookupGetter(object, property) || lookupSetter(object, property))) {
                      // As accessors are supported only on engines implementing
                      // `__proto__` we can safely override `__proto__` while defining
                      // a property to make sure that we don't hit an inherited
                      // accessor.
                      /* eslint-disable no-proto */
                      var prototype = object.__proto__;
                      object.__proto__ = prototypeOfObject;
                      // Deleting a property anyway since getter / setter may be
                      // defined on object itself.
                      delete object[property];
                      object[property] = descriptor.value;
                      // Setting original `__proto__` back now.
                      object.__proto__ = prototype;
                      /* eslint-enable no-proto */
                  } else {
                      object[property] = descriptor.value;
                  }
              } else {
                  var hasGetter = 'get' in descriptor;
                  var hasSetter = 'set' in descriptor;
                  if (!supportsAccessors && (hasGetter || hasSetter)) {
                      throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
                  }
                  // If we got that far then getters and setters can be defined !!
                  if (hasGetter) {
                      defineGetter(object, property, descriptor.get);
                  }
                  if (hasSetter) {
                      defineSetter(object, property, descriptor.set);
                  }
              }
              return object;
          };
      }
  
      // ES5 15.2.3.7
      // http://es5.github.com/#x15.2.3.7
      if (!Object.defineProperties || definePropertiesFallback) {
          Object.defineProperties = function defineProperties(object, properties) {
              // make a valiant attempt to use the real defineProperties
              if (definePropertiesFallback) {
                  try {
                      return definePropertiesFallback.call(Object, object, properties);
                  } catch (exception) {
                      // try the shim if the real one doesn't work
                  }
              }
  
              Object.keys(properties).forEach(function (property) {
                  if (property !== '__proto__') {
                      Object.defineProperty(object, property, properties[property]);
                  }
              });
              return object;
          };
      }
  
      // ES5 15.2.3.8
      // http://es5.github.com/#x15.2.3.8
      if (!Object.seal) {
          Object.seal = function seal(object) {
              if (Object(object) !== object) {
                  throw new TypeError('Object.seal can only be called on Objects.');
              }
              // this is misleading and breaks feature-detection, but
              // allows "securable" code to "gracefully" degrade to working
              // but insecure code.
              return object;
          };
      }
  
      // ES5 15.2.3.9
      // http://es5.github.com/#x15.2.3.9
      if (!Object.freeze) {
          Object.freeze = function freeze(object) {
              if (Object(object) !== object) {
                  throw new TypeError('Object.freeze can only be called on Objects.');
              }
              // this is misleading and breaks feature-detection, but
              // allows "securable" code to "gracefully" degrade to working
              // but insecure code.
              return object;
          };
      }
  
      // detect a Rhino bug and patch it
      try {
          Object.freeze(function () {});
      } catch (exception) {
          Object.freeze = (function (freezeObject) {
              return function freeze(object) {
                  if (typeof object === 'function') {
                      return object;
                  } else {
                      return freezeObject(object);
                  }
              };
          }(Object.freeze));
      }
  
      // ES5 15.2.3.10
      // http://es5.github.com/#x15.2.3.10
      if (!Object.preventExtensions) {
          Object.preventExtensions = function preventExtensions(object) {
              if (Object(object) !== object) {
                  throw new TypeError('Object.preventExtensions can only be called on Objects.');
              }
              // this is misleading and breaks feature-detection, but
              // allows "securable" code to "gracefully" degrade to working
              // but insecure code.
              return object;
          };
      }
  
      // ES5 15.2.3.11
      // http://es5.github.com/#x15.2.3.11
      if (!Object.isSealed) {
          Object.isSealed = function isSealed(object) {
              if (Object(object) !== object) {
                  throw new TypeError('Object.isSealed can only be called on Objects.');
              }
              return false;
          };
      }
  
      // ES5 15.2.3.12
      // http://es5.github.com/#x15.2.3.12
      if (!Object.isFrozen) {
          Object.isFrozen = function isFrozen(object) {
              if (Object(object) !== object) {
                  throw new TypeError('Object.isFrozen can only be called on Objects.');
              }
              return false;
          };
      }
  
      // ES5 15.2.3.13
      // http://es5.github.com/#x15.2.3.13
      if (!Object.isExtensible) {
          Object.isExtensible = function isExtensible(object) {
              // 1. If Type(O) is not Object throw a TypeError exception.
              if (Object(object) !== object) {
                  throw new TypeError('Object.isExtensible can only be called on Objects.');
              }
              // 2. Return the Boolean value of the [[Extensible]] internal property of O.
              var name = '';
              while (owns(object, name)) {
                  name += '?';
              }
              object[name] = true;
              var returnValue = owns(object, name);
              delete object[name];
              return returnValue;
          };
      }
  
  }));
  
  // Console-polyfill. MIT license.
  // https://github.com/paulmillr/console-polyfill
  // Make it safe to do console.log() always.
  (function(global) {
    'use strict';
    global.console = global.console || {};
    var con = global.console;
    var prop, method;
    var empty = {};
    var dummy = function() {};
    var properties = 'memory'.split(',');
    var methods = ('assert,clear,count,debug,dir,dirxml,error,exception,group,' +
    'groupCollapsed,groupEnd,info,log,markTimeline,profile,profiles,profileEnd,' +
    'show,table,time,timeEnd,timeline,timelineEnd,timeStamp,trace,warn').split(',');
    while (prop = properties.pop()) if (!con[prop]) con[prop] = empty;
    while (method = methods.pop()) if (typeof con[method] !== 'function') con[method] = dummy;
    // Using `this` for web workers & supports Browserify / Webpack.
  })(typeof window === 'undefined' ? this : window);
  
  /**
   * Module: rem - v1.3.4
   * Description: A polyfill to parse CSS links and rewrite pixel equivalents into head for non supporting browsers
   * Date Built: 2014-07-02
   * Copyright (c) 2014  | Chuck Carpenter <chuck.carpenter@me.com>,Lucas Serven <lserven@gmail.com>;
   * @see https://github.com/chuckcarpenter/REM-unit-polyfill
  **/
  
  (function (window, undefined) {
    "use strict";
    // test for REM unit support
    var cssremunit =  function() {
        var div = document.createElement( 'div' );
        div.style.cssText = 'font-size: 1rem;';
  
        return (/rem/).test(div.style.fontSize);
      },
  
    // filter returned links for stylesheets
      isStyleSheet = function () {
        var styles = document.getElementsByTagName('link'),
          filteredLinks = [];
  
        for ( var i = 0; i < styles.length; i++) {
          if ( styles[i].rel.toLowerCase() === 'stylesheet' && styles[i].getAttribute('data-norem') === null ) {
  
            filteredLinks.push( styles[i].href );
          }
        }
  
        return filteredLinks;
      },
  
      processLinks = function () {
        //prepare to match each link
        for( var i = 0; i < links.length; i++ ){
          xhr( links[i], storeCSS );
        }
      },
  
      storeCSS = function ( response, link ) {
  
        preCSS.push(response.responseText);
        CSSLinks.push(link);
  
        if( CSSLinks.length === links.length ){
          for( var j = 0; j <  CSSLinks.length; j++ ){
            matchCSS( preCSS[j], CSSLinks[j] );
          }
  
          if( ( links = importLinks.slice(0) ).length > 0 ){ //after finishing all current links, set links equal to the new imports found
            CSSLinks = [];
            preCSS = [];
            importLinks = [];
            processLinks();
          } else {
            buildCSS();
          }
        }
      },
  
      matchCSS = function ( sheetCSS, link ) { // collect all of the rules from the xhr response texts and match them to a pattern
        var clean = removeMediaQueries( sheetCSS ).replace(/\/\*[\s\S]*?\*\//g, ''), // remove MediaQueries and comments
          pattern = /[\w\d\s\-\/\\\[\]:,.'"*()<>+~%#^$_=|@]+\{[\w\d\s\-\/\\%#:!;,.'"*()]+\d*\.?\d+rem[\w\d\s\-\/\\%#:!;,.'"*()]*\}/g, //find selectors that use rem in one or more of their rules
          current = clean.match(pattern),
          remPattern =/\d*\.?\d+rem/g,
          remCurrent = clean.match(remPattern),
          sheetPathPattern = /(.*\/)/,
          sheetPath = sheetPathPattern.exec(link)[0], //relative path to css file specified in @import
          importPattern = /@import (?:url\()?['"]?([^'\)"]*)['"]?\)?[^;]*/gm, //matches all @import variations outlined at: https://developer.mozilla.org/en-US/docs/Web/CSS/@import
          importStatement;
  
        while( (importStatement = importPattern.exec(sheetCSS)) !== null ){
          if( importStatement[1].indexOf("/") === 0 ) { // check if the value of importStatement[1] is a root relative path, in which case it shouldn't be concatenated with sheetPath
            importLinks.push( importStatement[1] );
          } else {
            importLinks.push( sheetPath + importStatement[1] );
          }
        }
  
        if( current !== null && current.length !== 0 ){
          found = found.concat( current ); // save all of the blocks of rules with rem in a property
          foundProps = foundProps.concat( remCurrent ); // save all of the properties with rem
        }
      },
  
      buildCSS = function () { // first build each individual rule from elements in the found array and then add it to the string of rules.
        var pattern = /[\w\d\s\-\/\\%#:,.'"*()]+\d*\.?\d+rem[\w\d\s\-\/\\%#:!,.'"*()]*[;}]/g; // find properties with rem values in them
        for( var i = 0; i < found.length; i++ ){
          rules = rules + found[i].substr(0,found[i].indexOf("{")+1); // save the selector portion of each rule with a rem value
          var current = found[i].match( pattern );
          for( var j = 0; j<current.length; j++ ){ // build a new set of with only the selector and properties that have rem in the value
            rules = rules + current[j];
            if( j === current.length-1 && rules[rules.length-1] !== "}" ){
              rules = rules + "\n}";
            }
          }
        }
  
        parseCSS();
      },
  
      parseCSS = function () { // replace each set of parentheses with evaluated content
        for( var i = 0; i < foundProps.length; i++ ){
          css[i] = Math.round( parseFloat(foundProps[i].substr(0,foundProps[i].length-3)*fontSize) ) + 'px';
        }
  
        loadCSS();
      },
  
      loadCSS = function () { // replace and load the new rules
        for( var i = 0; i < css.length; i++ ){ // only run this loop as many times as css has entries
          if( css[i] ){
            rules = rules.replace( foundProps[i],css[i] ); // replace old rules with our processed rules
          }
        }
        var remcss = document.createElement( 'style' );
        remcss.setAttribute( 'type', 'text/css' );
        remcss.id = 'remReplace';
        document.getElementsByTagName( 'head' )[0].appendChild( remcss );   // create the new element
        if( remcss.styleSheet ) {
          remcss.styleSheet.cssText = rules; // IE8 will not support innerHTML on read-only elements, such as STYLE
        } else {
          remcss.appendChild( document.createTextNode( rules ) );
        }
      },
  
      xhr = function ( url, callback ) { // create new XMLHttpRequest object and run it
        try {
          //try to create a request object
          //arranging the two conditions this way is for IE7/8's benefit
          //so that it works with any combination of ActiveX or Native XHR settings,
          //as long as one or the other is enabled; but if both are enabled
          //it prefers ActiveX, which means it still works with local files
          //(Native XHR in IE7/8 is blocked and throws "access is denied",
          // but ActiveX is permitted if the user allows it [default is to prompt])
          var xhr = window.ActiveXObject ? ( new ActiveXObject('Microsoft.XMLHTTP') || new ActiveXObject('Msxml2.XMLHTTP') ) : new XMLHttpRequest();
  
          xhr.open( 'GET', url, true );
          xhr.onreadystatechange = function() {
            if ( xhr.readyState === 4 ){
              callback(xhr, url);
            } // else { callback function on AJAX error }
          };
  
          xhr.send( null );
        } catch (e){
          if ( window.XDomainRequest ) {
            var xdr = new XDomainRequest();
            xdr.open('get', url);
            xdr.onload = function() {
              callback(xdr, url);
            };
            xdr.onerror = function() {
              return false; // xdr load fail
            };
            xdr.send();
          }
        }
      },
  
    // Remove queries.
      removeMediaQueries = function(css) {
        // Test for Media Query support
        if ( !window.matchMedia && !window.msMatchMedia ) {
          // If the browser doesn't support media queries, we find all @media declarations in the CSS and remove them.
          // Note: Since @rules can't be nested in the CSS spec, we're safe to just check for the closest following "}}" to the "@media".
          css = css.replace(/@media[\s\S]*?\}\s*\}/g, "");
        }
  
        return css;
      };
  
    if( !cssremunit() ){ // this checks if the rem value is supported
      var rules = '', // initialize the rules variable in this scope so it can be used later
        links = isStyleSheet(), // initialize the array holding the sheets urls for use later
        importLinks = [], //initialize the array holding the import sheet urls for use later
        found = [], // initialize the array holding the found rules for use later
        foundProps = [], // initialize the array holding the found properties for use later
        preCSS = [], // initialize array that holds css before being parsed
        CSSLinks = [], //initialize array holding css links returned from xhr
        css = [], // initialize the array holding the parsed rules for use later
        fontSize = '';
  
      // Notice: rem is a "root em" that means that in case when html element size was changed by css
      // or style we should not change document.documentElement.fontSize to 1em - only body size should be changed
      // to 1em for calculation
  
      fontSize = (function () {
        var doc = document,
          docElement = doc.documentElement,
          body = doc.body || doc.createElement('body'),
          isFakeBody = !doc.body,
          div = doc.createElement('div'),
          currentSize = body.style.fontSize,
          size;
  
        if ( isFakeBody ) {
          docElement.appendChild( body );
        }
  
        div.style.cssText = 'width:1em; position:absolute; visibility:hidden; padding: 0;';
  
        body.style.fontSize = '1em';
  
        body.appendChild( div );
        size = div.offsetWidth;
  
        if ( isFakeBody ) {
          docElement.removeChild( body );
        }
        else {
          body.removeChild( div );
          body.style.fontSize = currentSize;
        }
  
        return size;
      }());
  
      processLinks();
    } // else { do nothing, you are awesome and have REM support }
  
  })(window);
  
  /*! Respond.js v1.4.2: min/max-width media query polyfill
   * Copyright 2014 Scott Jehl
   * Licensed under MIT
   * http://j.mp/respondjs */
  
  !function(a){"use strict";a.matchMedia=a.matchMedia||function(a){var b,c=a.documentElement,d=c.firstElementChild||c.firstChild,e=a.createElement("body"),f=a.createElement("div");return f.id="mq-test-1",f.style.cssText="position:absolute;top:-100em",e.style.background="none",e.appendChild(f),function(a){return f.innerHTML='&shy;<style media="'+a+'"> #mq-test-1 { width: 42px; }</style>',c.insertBefore(e,d),b=42===f.offsetWidth,c.removeChild(e),{matches:b,media:a}}}(a.document)}(this),function(a){"use strict";function b(){v(!0)}var c={};a.respond=c,c.update=function(){};var d=[],e=function(){var b=!1;try{b=new a.XMLHttpRequest}catch(c){b=new a.ActiveXObject("Microsoft.XMLHTTP")}return function(){return b}}(),f=function(a,b){var c=e();c&&(c.open("GET",a,!0),c.onreadystatechange=function(){4!==c.readyState||200!==c.status&&304!==c.status||b(c.responseText)},4!==c.readyState&&c.send(null))},g=function(a){return a.replace(c.regex.minmaxwh,"").match(c.regex.other)};if(c.ajax=f,c.queue=d,c.unsupportedmq=g,c.regex={media:/@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,keyframes:/@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,comments:/\/\*[^*]*\*+([^/][^*]*\*+)*\//gi,urls:/(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,findStyles:/@media *([^\{]+)\{([\S\s]+?)$/,only:/(only\s+)?([a-zA-Z]+)\s?/,minw:/\(\s*min\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,maxw:/\(\s*max\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,minmaxwh:/\(\s*m(in|ax)\-(height|width)\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/gi,other:/\([^\)]*\)/g},c.mediaQueriesSupported=a.matchMedia&&null!==a.matchMedia("only all")&&a.matchMedia("only all").matches,!c.mediaQueriesSupported){var h,i,j,k=a.document,l=k.documentElement,m=[],n=[],o=[],p={},q=30,r=k.getElementsByTagName("head")[0]||l,s=k.getElementsByTagName("base")[0],t=r.getElementsByTagName("link"),u=function(){var a,b=k.createElement("div"),c=k.body,d=l.style.fontSize,e=c&&c.style.fontSize,f=!1;return b.style.cssText="position:absolute;font-size:1em;width:1em",c||(c=f=k.createElement("body"),c.style.background="none"),l.style.fontSize="100%",c.style.fontSize="100%",c.appendChild(b),f&&l.insertBefore(c,l.firstChild),a=b.offsetWidth,f?l.removeChild(c):c.removeChild(b),l.style.fontSize=d,e&&(c.style.fontSize=e),a=j=parseFloat(a)},v=function(b){var c="clientWidth",d=l[c],e="CSS1Compat"===k.compatMode&&d||k.body[c]||d,f={},g=t[t.length-1],p=(new Date).getTime();if(b&&h&&q>p-h)return a.clearTimeout(i),i=a.setTimeout(v,q),void 0;h=p;for(var s in m)if(m.hasOwnProperty(s)){var w=m[s],x=w.minw,y=w.maxw,z=null===x,A=null===y,B="em";x&&(x=parseFloat(x)*(x.indexOf(B)>-1?j||u():1)),y&&(y=parseFloat(y)*(y.indexOf(B)>-1?j||u():1)),w.hasquery&&(z&&A||!(z||e>=x)||!(A||y>=e))||(f[w.media]||(f[w.media]=[]),f[w.media].push(n[w.rules]))}for(var C in o)o.hasOwnProperty(C)&&o[C]&&o[C].parentNode===r&&r.removeChild(o[C]);o.length=0;for(var D in f)if(f.hasOwnProperty(D)){var E=k.createElement("style"),F=f[D].join("\n");E.type="text/css",E.media=D,r.insertBefore(E,g.nextSibling),E.styleSheet?E.styleSheet.cssText=F:E.appendChild(k.createTextNode(F)),o.push(E)}},w=function(a,b,d){var e=a.replace(c.regex.comments,"").replace(c.regex.keyframes,"").match(c.regex.media),f=e&&e.length||0;b=b.substring(0,b.lastIndexOf("/"));var h=function(a){return a.replace(c.regex.urls,"$1"+b+"$2$3")},i=!f&&d;b.length&&(b+="/"),i&&(f=1);for(var j=0;f>j;j++){var k,l,o,p;i?(k=d,n.push(h(a))):(k=e[j].match(c.regex.findStyles)&&RegExp.$1,n.push(RegExp.$2&&h(RegExp.$2))),o=k.split(","),p=o.length;for(var q=0;p>q;q++)l=o[q],g(l)||m.push({media:l.split("(")[0].match(c.regex.only)&&RegExp.$2||"all",rules:n.length-1,hasquery:l.indexOf("(")>-1,minw:l.match(c.regex.minw)&&parseFloat(RegExp.$1)+(RegExp.$2||""),maxw:l.match(c.regex.maxw)&&parseFloat(RegExp.$1)+(RegExp.$2||"")})}v()},x=function(){if(d.length){var b=d.shift();f(b.href,function(c){w(c,b.href,b.media),p[b.href]=!0,a.setTimeout(function(){x()},0)})}},y=function(){for(var b=0;b<t.length;b++){var c=t[b],e=c.href,f=c.media,g=c.rel&&"stylesheet"===c.rel.toLowerCase();e&&g&&!p[e]&&(c.styleSheet&&c.styleSheet.rawCssText?(w(c.styleSheet.rawCssText,e,f),p[e]=!0):(!/^([a-zA-Z:]*\/\/)/.test(e)&&!s||e.replace(RegExp.$1,"").split("/")[0]===a.location.host)&&("//"===e.substring(0,2)&&(e=a.location.protocol+e),d.push({href:e,media:f})))}x()};y(),c.update=y,c.getEmValue=u,a.addEventListener?a.addEventListener("resize",b,!1):a.attachEvent&&a.attachEvent("onresize",b)}}(this);