Implemented tooltip follows mouse (not perfect).

Fixed bug when using mousewheel action on inventory items.
Added a debug mode for tooltip following mouse

addons/escoria-core/game/escoria.gd

@@ -79,6 +79,10 @@ func register_object(object : Object):
 	if object is ESCInventory:
 		inventory = object
 	
+	if object is ESCTooltip:
+		if main.current_scene:
+			main.current_scene.game.tooltip_node = object
+	
 		
 
 """