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/client/client.lua

@@ -0,0 +1,44 @@
+Client = {}
+
+function Client.init()
+  g_window.setMinimumSize({ width = 600, height = 480 })
+
+  -- initialize in fullscreen mode on mobile devices
+  if g_window.getPlatformType() == "X11-EGL" then
+    g_window.setFullscreen(true)
+  else
+    -- window size
+    local size = { width = 800, height = 600 }
+    size = Settings.getSize('window-size', size)
+    g_window.resize(size)
+
+    -- window position, default is the screen center
+    local displaySize = g_window.getDisplaySize()
+    local defaultPos = { x = (displaySize.width - size.width)/2,
+                         y = (displaySize.height - size.height)/2 }
+    local pos = Settings.getPoint('window-pos', defaultPos)
+    g_window.move(pos)
+
+    -- window maximized?
+    local maximized = Settings.getBoolean('window-maximized', false)
+    if maximized then g_window.maximize() end
+  end
+
+  g_window.setTitle('OTClient')
+  g_window.setIcon(resolvepath('clienticon.png'))
+
+  -- show the only window after the first frame is rendered
+  addEvent(function()
+    addEvent(function()
+        g_window.show()
+    end)
+  end)
+end
+
+function Client.terminate()
+  -- save window configs
+  Settings.set('window-size', g_window.getUnmaximizedSize())
+  Settings.set('window-pos', g_window.getUnmaximizedPos())
+  Settings.set('window-maximized', g_window.isMaximized())
+  Client = nil
+end

modules/client/client.otmod

@@ -0,0 +1,23 @@
+Module
+  name: client
+  description: Initialize the client and setups its main window
+  author: OTClient team
+  website: https://github.com/edubart/otclient
+  autoload: true
+  autoload-priority: 100
+
+  load-later:
+    - client_topmenu
+    - client_background
+    - client_about
+    - client_options
+    - client_terminal
+    - client_modulemanager
+    - client_entergame
+
+  @onLoad: |
+    dofile 'client'
+    Client.init()
+
+  @onUnload: |
+    Client.terminate()