title: Datamap is undefined in datamaps d3
body: <p>I need to get the datamap world graph added to the "maps-world" id in the div element as given below:</p>
  
  <pre><code>            &lt;div id="maps-world" class="clearfix map"  style="position: relative; width: 80%; max-height: 450px;"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Following are the dependencies Im adding (all the dependencies are made local)</p>
  
  <pre><code>&lt;script src="js/twitter/maps/d3.v3.min.js"&gt;&lt;/script&gt; 
  &lt;script src="js/twitter/maps/datamaps.world.min.js"&gt;&lt;/script&gt; 
  &lt;script src="js/twitter/maps/topojson.v1.min.js"&gt;&lt;/script&gt; 
  </code></pre>
  
  <p>Following is the code which I am using to generate the world graph:</p>
  
  <pre><code>var map = new Datamap({
      scope: 'world',
      element: document.getElementById('maps-world'),
      projection: 'mercator',
      height: 500,
      fills: {
        defaultFill: '#f0af0a',
        lt50: 'rgba(0,244,244,0.9)',
        gt50: 'red'
      },
  
  data: {
    USA: {fillKey: 'lt50' },
    RUS: {fillKey: 'lt50' },
    CAN: {fillKey: 'lt50' },
    BRA: {fillKey: 'gt50' },
    ARG: {fillKey: 'gt50'},
    COL: {fillKey: 'gt50' },
    AUS: {fillKey: 'gt50' },
    ZAF: {fillKey: 'gt50' },
    MAD: {fillKey: 'gt50' }       
  }
    })
  
    map.arc([
     {
      origin: {
          latitude: 40.639722,
          longitude: 73.778889
      },
      destination: {
          latitude: 37.618889,
          longitude: -122.375
      }
    },
    {
        origin: {
            latitude: 30.194444,
            longitude: -97.67
        },
        destination: {
            latitude: 25.793333,
            longitude: -0.290556
        }
    }
    ], {strokeWidth: 2});
  
   map.bubbles([
     {name: 'Hot', latitude: 21.32, longitude: 5.32, radius: 10, fillKey: 'gt50'},
     {name: 'Chilly', latitude: -25.32, longitude: 120.32, radius: 18, fillKey: 'lt50'},
     {name: 'Hot again', latitude: 21.32, longitude: -84.32, radius: 8, fillKey: 'gt50'},
  
   ], {
     popupTemplate: function(geo, data) {
       return "&lt;div class='hoverinfo'&gt;It is " + data.name + "&lt;/div&gt;";
     }
   });
  </code></pre>
  
  <p>I'm receiving the following error in my console.
      <strong>Datamap is undefined</strong></p>
  
  <p>Since it was the example that was given in the <a href="http://datamaps.github.io/" rel="nofollow">datamap-github-page</a> named Choropleth,it was expected to be working fine.
  Can any body help me on this.</p>