Added Game core loop stepping support. Super-useful for debugging, and helped me track down the issue with jittery physics collision. Double-win!

src/tilemap/Tilemap.js

@@ -1227,6 +1227,7 @@ Phaser.Tilemap.prototype = {
     destroy: function () {
 
         this.removeAllLayers();
+        this.data = [];
         this.game = null;
 
     }