title: Three.js SceneUtils has no traverseHierarchy!!! where is it?
body: <p>I had not updated the three.js library in my system. Today, I updated the three.js file. But I encountered this error: "Uncaught TypeError: Object # has no method 'traverseHierarchy' ".</p>
  
  <p>I had used it for detecting intersection:
  Online code is here: <a href="https://dl.dropbox.com/u/44791710/test/simple2.html" rel="nofollow">https://dl.dropbox.com/u/44791710/test/simple2.html</a></p>
  
  <pre><code>function Intersect(event) {
      event.preventDefault();
      var mousex = (event.clientX / window.innerWidth) * 2 - 1;
      var mousey = -(event.clientY / window.innerHeight) * 2 + 1;
      var vector = new THREE.Vector3(mousex, mousey, 1);
  
      var toIntersect = [];
      THREE.SceneUtils.traverseHierarchy(scene, function (child) {
          if (child instanceof THREE.Mesh) {
              toIntersect.push(child);
          }
      });
      var projector = new THREE.Projector();
      projector.unprojectVector(vector, camera);
      var ray = new THREE.Raycaster(camera.position,vector.sub(camera.position).normalize());
      var intersects = ray.intersectObjects(toIntersect);
      if (intersects.length &gt; 0) {
          for (var j = 0; j &lt; intersects.length ; j++){
                  target = intersects[j].object;
                  console.log('Intersects at ' + mouse.x + '/' + mouse.y + ':');
                  for(var i = 0, m = intersects.length; i&lt;m; i++){
                       console.log(intersects[i].object.id, intersects[i]);
                  }
          }
      }
  }
  </code></pre>
  
  <p>what kind of changes I need to do?
  Thanks.</p>