Merge pull request useflashpunk#80 from BlckKnght/motion

Motion tween update

net/flashpunk/tweens/motion/Motion.as

@@ -10,12 +10,38 @@
 		/**
 		 * Current x position of the Tween.
 		 */
-		public var x:Number = 0;
+		public function get x():Number { return _x; }
+		public function set x(value:Number):void
+		{
+			_x = value;
+			if (_object)
+				_object.x = _x;
+		}
 
 		/**
 		 * Current y position of the Tween.
 		 */
-		public var y:Number = 0;
+		public function get y():Number { return _y; }
+		public function set y(value:Number):void
+		{
+			_y = value;
+			if (_object)
+				_object.y = _y;
+		}
+
+		/**
+		 * Target object for the tween. Must have an x and a y property.
+		 */
+		public function get object():Object { return _object; }
+		public function set object(value:Object):void
+		{
+			_object = value;
+			if (_object)
+			{
+				_object.x = _x;
+				_object.y = _y;
+			}
+		}
 
 		/**
 		 * Constructor.
@@ -28,5 +54,9 @@
 		{
 			super(duration, type, complete, ease);
 		}
+
+		protected var _x:Number = 0;
+		protected var _y:Number = 0;
+		protected var _object:Object;
 	}
 }