title: How to set Cesium JS map center (coordinates: latitude & longitude)
body: <p>I would like to initialize <a href="http://cesiumjs.org/" rel="noreferrer">cesium</a> so that the map is centered on some specific coordinates instead of the default ones. I have the following initialization code:</p>
  
  <pre><code>var map = new Cesium.CesiumWidget('map-js');
  map.centralBody.terrainProvider = new Cesium.CesiumTerrainProvider({
      url : 'http://cesiumjs.org/smallterrain'
  });
  </code></pre>
  
  <p>Usually, with other mapping libraries, I would set the center on initialization, eg on mapbox:</p>
  
  <pre><code>map = L.mapbox.map('map-js', 'api-key').setView([42.12, 12.45], 9);
  </code></pre>
  
  <p>How to do that with <strong>cesium</strong>?</p>