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/uiwindow.lua

@@ -0,0 +1,38 @@
+UIWindow = extends(UIWidget)
+
+function UIWindow.create()
+  local window = UIWindow.internalCreate()
+  window:setTextAlign(AlignTopCenter)
+  window:setDragable(true)
+  return window
+end
+
+function UIWindow:onKeyDown(keyCode, keyboardModifiers)
+  if keyboardModifiers == KeyboardNoModifier then
+    if keyCode == KeyEnter then
+      signalcall(self.onEnter, self)
+    elseif keyCode == KeyEscape then
+      signalcall(self.onEscape, self)
+    end
+  end
+end
+
+function UIWindow:onFocusChange(focused)
+  if focused then self:raise() end
+end
+
+function UIWindow:onDragEnter(mousePos)
+  self:breakAnchors()
+  self.movingReference = { x = mousePos.x - self:getX(), y = mousePos.y - self:getY() }
+  return true
+end
+
+function UIWindow:onDragLeave(droppedWidget, mousePos)
+  -- TODO: auto detect and reconnect anchors
+end
+
+function UIWindow:onDragMove(mousePos, mouseMoved)
+  local pos = { x = mousePos.x - self.movingReference.x, y = mousePos.y - self.movingReference.y }
+  self:setPosition(pos)
+  self:bindRectToParent()
+end