Added CSS3Filters plugin. Also modified Sprite to contain preUpdate call, so that update can be over-ridden by custom Classes + added an example for this.

src/gameobjects/GameObjectFactory.js

@@ -10,6 +10,12 @@ Phaser.GameObjectFactory.prototype = {
 	game: null,
     world: null,
 
+    existing: function (object) {
+
+        return this.world.add(object);
+
+    },
+
 	/**
     * Create a new Sprite with specific position and sprite sheet key.
     *

src/gameobjects/Sprite.js

@@ -155,9 +155,9 @@ Phaser.Sprite.prototype = Object.create(PIXI.Sprite.prototype);
 Phaser.Sprite.prototype.constructor = Phaser.Sprite;
 
 /**
- * Automatically called by World.update
+ * Automatically called by World.update. You can create your own update in Objects that extend Phaser.Sprite.
  */
-Phaser.Sprite.prototype.update = function() {
+Phaser.Sprite.prototype.preUpdate = function() {
 
     if (!this.exists)
     {