restore some game functionallity

* i'm gradually restoring game functionality with the new modules design, though still a lot to do
* you can reload all scripts and modules using Ctrl+R shortcut while playing (finally! this is the reason of all this rework)
* a bunch of fixes, but new regression too :P
* fix performance issue that could lead freezes in the client in older machines
* completely new game module with new design
* fix crashs in map render
* remove uigame.cpp (now every game input is via lua)
* enable DEBUG macro by default, with it you are able to view any possible lua leak while running

modules/old/game_interface/gameinterface.otui

@@ -1,14 +1,14 @@
 GameSidePanel < UIMiniWindowContainer
-  image-source: /core_styles/styles/images/sidepanel.png
+  image-source: images/sidepanel.png
   image-border: 4
 
 GameBottomPanel < Panel
-  image-source: /core_styles/styles/images/bottompanel.png
+  image-source: images/bottompanel.png
   image-border: 4
 
 GameMapPanel < UIMap
   padding: 4
-  image-source: /core_styles/styles/images/mappanel.png
+  image-source: images/mappanel.png
   image-border: 4
 
 UIGame
@@ -16,7 +16,7 @@ UIGame
   anchors.fill: parent
   anchors.top: topMenu.bottom
 
-  InterfacePanel
+  GameSidePanel
     id: gameRightPanel
     width: 190
     layout: verticalBox