Integration (with myself) fixes

- Adding default value in empty frames to avoid artifact when paint
bucketing (you may have issues with previously stored model before this
commit, no migration plan for papybrossette :D)
 - Fix issue: Model does not show up when loading a remote GAE model
 - Removing FRAMESHEET_UPDATED events (remains of history manager
implementation)

js/drawingtools/PaintBucket.js

@@ -21,18 +21,12 @@
 		var targetColor = pskl.utils.normalizeColor(frame[col][row]);
 		//this.recursiveFloodFill_(frame, col, row, targetColor, color);
 		this.queueLinearFloodFill_(frame, col, row, targetColor, color);
-		$.publish(Events.FRAMESHEET_UPDATED);
-        
+		
 		// Draw in canvas:
 		// TODO: Remove that when we have the centralized redraw loop
 		this.drawFrameInCanvas(frame, canvas, dpi);
 	};
 
-	ns.PaintBucket.prototype.releaseToolAt = function(col, row, frame, color, canvas, dpi) {
-		// TODO: Create a afterRelease event hook or put that deep in the model
-		$.publish(Events.FRAMESHEET_UPDATED);   
-	};
-	
 	/**
 	 *  Flood-fill (node, target-color, replacement-color):
 	 *	 1. Set Q to the empty queue.