Fixed an error that stopped 2 tweens from being able to run on the same object. Also refactored a lot of the classes to remove prototype properties and move them to local instance properties.

src/geom/Rectangle.js

@@ -48,34 +48,6 @@ Phaser.Rectangle = function (x, y, width, height) {
 
 Phaser.Rectangle.prototype = {
 
-    /**
-     * @property x
-     * @type Number
-     * @default 0
-     */
-    x: 0,
-    
-    /**
-     * @property y
-     * @type Number
-     * @default 0
-     */
-    y: 0,
-    
-    /**
-     * @property width
-     * @type Number
-     * @default 0
-     */
-    width: 0,
-    
-    /**
-     * @property height
-     * @type Number
-     * @default 0
-     */
-    height: 0,
-
     /**
     * Adjusts the location of the Rectangle object, as determined by its top-left corner, by the specified amounts.
     * @method offset