title: turf.within() fails but turf.inside() is successful
body: <p>I am trying to use <a href="http://turfjs.org/" rel="nofollow noreferrer">turf.js</a> to return points within a polygon, but <a href="http://turfjs.org/docs/#within" rel="nofollow noreferrer">turf.within()</a> generates an empty feature list even for points I know to be within a polygon - turf.inside() returns true for the same points and polygon. I provide an example below. I can successfully run the example at turf.within() and am not sure what it is about my geometry that is the problem.</p>
  
  <pre><code>&lt;script type="text/javascript" src="https://npmcdn.com/@turf/turf/turf.min.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>....</p>
  
  <pre><code>var thePoint = [-118.049551, 33.866965]
  
  var test = {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {},
        "geometry": {
          "type": "Point",
          "coordinates": thePoint
        }
      }, {
        "type": "Feature",
        "properties": {},
        "geometry": {
          "type": "Point",
          "coordinates": thePoint
        }
      }
    ]
  };
  
  var cerrito = { "type": "Feature", "properties": { "GEO_ID":    "1600000US0612552", "STATE": "06", "PLACE": "12552", "NAME": "Cerritos", "LSAD": "city", "CENSUSAREA": 8.725, "Shape_STAr": 246572616.215, "Shape_STLe": 118080.76087 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -118.028887999836968, 33.882629000032836 ], [ -118.028681155924062, 33.873316057140322 ], [ -118.028772420533898, 33.873315497179512 ], [ -118.028772240680681, 33.873285861714471 ], [ -118.028761755934283, 33.872110544548683 ], [ -118.028717388339928, 33.866241889545748 ], [ -118.028792999919617, 33.866240999737094 ], [ -118.035119980483032, 33.866020314132811 ], [ -118.035591866241305, 33.866016576824734 ], [ -118.035818357122793, 33.866015383719059 ], [ -118.035983055259194, 33.866014509762415 ], [ -118.036147752309518, 33.8660136310734 ], [ -118.036148847050185, 33.866013630744973 ], [ -118.037598000415159, 33.866012999764315 ], [ -118.037597881676277, 33.866006075268416 ], [ -118.037624048408333, 33.866005950805395 ], [ -118.037575372135976, 33.86388909386703 ], [ -118.037562273006358, 33.863314044528884 ], [ -118.037540454019165, 33.86236905889217 ], [ -118.037606327718564, 33.862368507358319 ], [ -118.037979218998117, 33.862365367620129 ], [ -118.039225723817765, 33.862354938919154 ], [ -118.039350888987059, 33.862353881198253 ], [ -118.039574899257346, 33.862352021930512 ], [ -118.039782079613744, 33.862350277788913 ], [ -118.039963633664883, 33.86234876086143 ], [ -118.040128290807047, 33.862347360175178 ], [ -118.040309482829713, 33.862345842847105 ], [ -118.040474501989308, 33.862344468612086 ], [ -118.040655693999881, 33.862342951664914 ], [ -118.040820383551591, 33.862341577067333 ], [ -118.041001575536058, 33.862340031653119 ], [ -118.041166594672802, 33.862338656470193 ], [ -118.041522357556943, 33.86233567659459 ], [ -118.041555328956449, 33.86233539026582 ], [ -118.04158826686961, 33.86233513188656 ], [ -118.041667975939376, 33.862334444439369 ], [ -118.041884905794092, 33.862332720355347 ], [ -118.041879045435579, 33.861679208477895 ], [ -118.041878661410877, 33.861635133586446 ], [ -118.041877779312557, 33.861530668241585 ], [ -118.041877117333357, 33.861453668349675 ], [ -118.041875622573116, 33.86128871703405 ], [ -118.041874434390664, 33.861151243763409 ], [ -118.04187324622599, 33.86101379844164 ], [ -118.041872056970632, 33.860876325175354 ], [ -118.041870868813831, 33.86073887985755 ], [ -118.041869613384449, 33.860598713795902 ], [ -118.041868145114535, 33.860428321848957 ], [ -118.04186653720933, 33.860242294996745 ], [ -118.041865207827939, 33.860088170827417 ], [ -118.041854341147129, 33.858838905318855 ], [ -118.041854202456747, 33.8588251662961 ], [ -118.041853336146318, 33.858724067229424 ], [ -118.046188000416265, 33.858768000030139 ], [ -118.046186748924541, 33.858687270846296 ], [ -118.046200389259099, 33.858687186283355 ], [ -118.046186014574644, 33.857785576122218 ], [ -118.046163305133547, 33.856407842019244 ], [ -118.046152668322023, 33.855664249739483 ], [ -118.046110568906883, 33.853648342941831 ], [ -118.04611084525645, 33.853610518941778 ], [ -118.047386006877716, 33.853589266798537 ], [ -118.048728911992114, 33.853575817845297 ], [ -118.049101279351319, 33.853572084045524 ], [ -118.049609117085879, 33.853568105873244 ], [ -118.05041069369274, 33.85356182224956 ], [ -118.050410420346836, 33.853533108261765 ], [ -118.050405543181043, 33.853033914419463 ], [ -118.050399505365675, 33.852413871433946 ], [ -118.050398863336483, 33.852345210650313 ], [ -118.050398171596498, 33.852276536365281 ], [ -118.050395364025476, 33.851988181322085 ], [ -118.050394029188837, 33.851850845358634 ], [ -118.0503926949755, 33.851712741307736 ], [ -118.050392161744654, 33.85165789437027 ], [ -118.050391361261092, 33.851575460340229 ], [ -118.050390027518588, 33.85143812528397 ], [ -118.050388692733023, 33.851300845222546 ], [ -118.050387326600486, 33.851163537229304 ], [ 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33.873111000077408 ], [ -118.08004299960642, 33.873053999696083 ], [ -118.07964899968843, 33.876462000326832 ], [ -118.07927399950583, 33.87674000007636 ], [ -118.075086999544695, 33.8767670000233 ], [ -118.074840999957502, 33.876769000254562 ], [ -118.074895000371953, 33.880383000438925 ], [ -118.072708000101883, 33.880391999903772 ], [ -118.072825000397017, 33.885832999950722 ], [ -118.068447000489812, 33.885887999807679 ], [ -118.06846999965768, 33.887112000073593 ], [ -118.068475999850449, 33.887559000148578 ], [ -118.066323999719302, 33.887571000149549 ], [ -118.06528799964515, 33.887577000140304 ], [ -118.064333000067364, 33.887581999621858 ], [ -118.06408499971505, 33.887165000021376 ], [ -118.055376000176864, 33.887216000217663 ], [ -118.055382999695453, 33.887649999683752 ], [ -118.046538999840678, 33.887713000322073 ], [ -118.038572000150765, 33.88777300012908 ], [ -118.028887999836968, 33.882629000032836 ] ] ] ] } }
  
  var cerritoPolygon = turf.polygon(cerrito.geometry.coordinates[0]) //turn cerrito coordinates into polygon
  
  var cerritoFeatureCollection = turf.featureCollection(cerrito) //create a feature collection
  
  var ptsWithin = turf.within(test, cerritoFeatureCollection); //see if test points are within the cerrito featureCollection
  
  var pt = turf.point(thePoint);
  
  var isInside = turf.inside(pt, cerritoPolygon);
  
  console.log(ptsWithin)//returns a featureCollection with an empty features array
  console.log(isInside)//returns true - thePoint is in the cerrito polygon
  </code></pre>