Added Group IDs and references to Sprites, Group sorting, z-index values and child swapping. Also added all of the drag and bounds methods to Input.

Phaser/gameobjects/IGameObject.ts

@@ -9,6 +9,16 @@ module Phaser {
          */
         game: Game;
 
+        /**
+         * The type of game object.
+         */
+        type: number;
+
+        /**
+         * The ID of the Group this Sprite belongs to.
+         */
+        group: Group;
+
         /**
          * x value of the object.
          */
@@ -24,16 +34,6 @@ module Phaser {
          */
         z: number;
 
-        /**
-         * The type of game object.
-         */
-        type: number;
-
-        /**
-         * Reference to the Renderer.renderSprite method. Can be overriden by custom classes.
-         */
-        //render;
-
         /**
          * Controls if both <code>update</code> and render are called by the core game loop.
          */