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/uimessagebox.lua

@@ -0,0 +1,65 @@
+UIMessageBox = extends(UIWindow)
+
+MessageBoxOk = 1
+MessageBoxCancel = 2
+
+-- messagebox cannot be created from otui files
+UIMessageBox.create = nil
+
+function UIMessageBox.display(title, message, flags)
+  local messagebox = UIMessageBox.internalCreate()
+  rootWidget:addChild(messagebox)
+
+  messagebox:setStyle('MessageBoxWindow')
+  messagebox:setText(title)
+
+  local messageLabel = createWidget('MessageBoxLabel', messagebox)
+  messageLabel:setText(message)
+  messageLabel:resizeToText()
+
+  messagebox:setWidth(math.max(messageLabel:getWidth() + 48, messagebox:getWidth()))
+  messagebox:setHeight(math.max(messageLabel:getHeight() + 64, messagebox:getHeight()))
+
+  -- setup messagebox first button
+  local buttonRight = createWidget('MessageBoxRightButton', messagebox)
+
+  if flags == MessageBoxOk then
+    buttonRight:setText('Ok')
+    connect(buttonRight, { onClick = function(self) self:getParent():ok() end })
+    connect(messagebox, { onEnter = function(self) self:ok() end })
+    connect(messagebox, { onEscape = function(self) self:ok() end })
+  elseif flags == MessageBoxCancel then
+    buttonRight:setText('Cancel')
+    connect(buttonRight, { onClick = function(self) self:getParent():cancel() end })
+    connect(messagebox, { onEnter = function(self) self:cancel() end })
+    connect(messagebox, { onEscape = function(self) self:cancel() end })
+  end
+
+  messagebox:lock()
+
+  return messagebox
+end
+
+function displayInfoBox(title, message)
+  return UIMessageBox.display(title, message, MessageBoxOk)
+end
+
+function displayErrorBox(title, message)
+  return UIMessageBox.display(title, message, MessageBoxOk)
+end
+
+function displayCancelBox(title, message)
+  return UIMessageBox.display(title, message, MessageBoxCancel)
+end
+
+function UIMessageBox:ok()
+  signalcall(self.onOk, self)
+  self.onOk = nil
+  self:destroy()
+end
+
+function UIMessageBox:cancel()
+  signalcall(self.onCancel, self)
+  self.onCancel = nil
+  self:destroy()
+end