add a simple example

docs/api/loaders/OBJLoader.html

@@ -50,6 +50,21 @@
 
 		<h2>Example</h2>
 
+		<code>
+		// instantiate a loader
+		var loader = new THREE.OBJLoader();
+
+		// load a resource
+		loader.load(
+			// resource URL
+			'models/skinned/UCS_config.json',
+			// Function when resource is loaded
+			function ( object ) {
+				scene.add( object );
+			}
+		);
+		</code>
+
 		[example:webgl_loader_obj]