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/client_terminal/terminal.lua

@@ -184,12 +184,8 @@ function Terminal.executeCommand(command)
 
   -- detect and convert commands with simple syntax
   local realCommand
-  if commandEnv[command] then
-    if type(commandEnv[command]) == "function" then
-      realCommand = command .. '()'
-    else
-      realCommand = 'print(' .. command .. ')'
-    end
+  if string.sub(command, 1, 1) == '=' then
+    realCommand = 'print(' .. string.sub(command,2) .. ')'
   else
     realCommand = command
   end