Add Phaser.GameObjects.TileSprite#setTilePosition

Both arguments are optional.

Author: samme

src/gameobjects/tilesprite/TileSprite.js

@@ -188,6 +188,32 @@ var TileSprite = new Class({
         }, this);
     },
 
+    /**
+     * Sets {@link Phaser.GameObjects.TileSprite#tilePositionX} and {@link Phaser.GameObjects.TileSprite#tilePositionY}.
+     *
+     * @method Phaser.GameObjects.TileSprite#setTilePosition
+     * @since [version]
+     *
+     * @param {number} [x] - The x position of this sprite's tiling texture.
+     * @param {number} [y] - The y position of this sprite's tiling texture.
+     *
+     * @return {Phaser.GameObjects.TileSprite} This Tile Sprite instance.
+     */
+    setTilePosition: function (x, y)
+    {
+        if (x !== undefined)
+        {
+            this.tilePositionX = x;
+        }
+
+        if (y !== undefined)
+        {
+            this.tilePositionY = y;
+        }
+
+        return this;
+    },
+
     /**
      * [description]
      *