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/core_lib/widgets/uitabbar.lua

@@ -36,7 +36,8 @@ function UITabBar:addTab(text, panel)
   tab.tabBar = self
   tab:setText(text)
   tab:setWidth(tab:getTextSize().width + tab:getPaddingLeft() + tab:getPaddingRight())
-  connect(tab, { onClick = onTabClick })
+  tab.onClick = onTabClick
+  tab.onDestroy = function() tab.tabPanel:destroy() end
 
   table.insert(self.tabs, tab)
   if #self.tabs == 1 then