Added debug object back in.

Author: photonstorm

src/tilemap/TilemapLayerGL.js

@@ -86,6 +86,35 @@ Phaser.TilemapLayerGL = function (game, tilemap, index, width, height) {
     */
     this.exists = true;
 
+    /**
+    * Settings used for debugging and diagnostics.
+    *
+    * @property {?string} missingImageFill - A tile is rendered as a rectangle using the following fill if a valid tileset/image cannot be found. A value of `null` prevents additional rendering for tiles without a valid tileset image. _This takes effect even when debug rendering for the layer is not enabled._
+    *
+    * @property {?string} debuggedTileOverfill - If a Tile has `Tile#debug` true then, after normal tile image rendering, a rectangle with the following fill is drawn above/over it. _This takes effect even when debug rendering for the layer is not enabled._
+    *
+    * @property {boolean} forceFullRedraw - When debug rendering (`debug` is true), and this option is enabled, the a full redraw is forced and rendering optimization is suppressed.
+    *
+    * @property {number} debugAlpha - When debug rendering (`debug` is true), the tileset is initially rendered with this alpha level. This can make the tile edges clearer.
+    *
+    * @property {?string} facingEdgeStroke - When debug rendering (`debug` is true), this color/stroke is used to draw "face" edges. A value of `null` disables coloring facing edges.
+    *
+    * @property {?string} collidingTileOverfill - When debug rendering (`debug` is true), this fill is used for tiles that are collidable. A value of `null` disables applying the additional overfill.
+    *
+    */
+    this.debugSettings = {
+
+        missingImageFill: 'rgb(255,255,255)',
+        debuggedTileOverfill: 'rgba(0,255,0,0.4)',
+
+        forceFullRedraw: true,
+
+        debugAlpha: 0.5,
+        facingEdgeStroke: 'rgba(0,255,0,1)',
+        collidingTileOverfill: 'rgba(0,255,0,0.2)'
+
+    };
+
     /**
     * Speed at which this layer scrolls horizontally, relative to the camera (e.g. scrollFactorX of 0.5 scrolls half as quickly as the 'normal' camera-locked layers do).
     * @property {number} scrollFactorX