Updated README.md example with the new .add()

README.md

@@ -104,7 +104,7 @@ This code creates a camera, then creates a scene, adds a cube on it, creates a &
 			material = new THREE.MeshBasicMaterial( { color: 0xff0000, wireframe: true } );
 
 			mesh = new THREE.Mesh( geometry, material );
-			scene.addObject( mesh );
+			scene.add( mesh );
 
 			renderer = new THREE.CanvasRenderer();
 			renderer.setSize( window.innerWidth, window.innerHeight );