BEAWARE all game functionality is disabled with this commit for a while

* rework client modules
* hide main window when loading
* remake top menu functions
* rework modules autoload
* improve path resolving for otml and lua
* move core_widgets to core_lib
* fix tooltip issues
* split some styles
* add bit32 lua library
* fix assert issues
* fix compilation on linux 32 systems
* rework gcc compile options
* renable and fix some warnings
* remove unused constants
* speedup sprite cache
* move UIGame to lua (not funcional yet)
* fix a lot of issues in x11 window
* fix crash handler
* add some warnings do uiwidget
and much more...

modules/core_lib/widgets/uicheckbox.lua

@@ -0,0 +1,13 @@
+UICheckBox = extends(UIWidget)
+
+function UICheckBox.create()
+  local checkbox = UICheckBox.internalCreate()
+  checkbox:setFocusable(false)
+  checkbox:setTextAlign(AlignLeft)
+  return checkbox
+end
+
+function UICheckBox:onMousePress(mousePos, mouseButton)
+  self:setChecked(not self:isChecked())
+  return true
+end