title: THREE.STLLoader is not a constructor
body: <p>I have been trying to load a STL model on three.js 
  I keep getting  THREE.STLLoader is not a constructor on the console</p>
  
  <p>this is my code:</p>
  
  <pre><code>  var loader = new THREE.STLLoader();
     loader.load( '3dbenchy-1.stl', function ( geometry ) {
     scene.add( new THREE.Mesh( geometry ) );
     });
  </code></pre>