Multi-protocol

Lots of chagnes to add multi protocol flexibility, not really
completed yet, still have to rework text messages opcodes and other stuff,
so this still a working in progress feature

* Rework dat reader, the dat reader can now
* dinamically detect dat version
* Split game into gamelib and game_interface
* Lots of other minor changes

src/framework/core/application.cpp

@@ -141,3 +141,14 @@ void Application::close()
     if(!g_lua.callGlobalField<bool>("g_app", "onClose"))
         exit();
 }
+
+std::string Application::getOs()
+{
+#if defined(WIN32)
+    return "windows";
+#elif defined(__APPLE__)
+    return "mac";
+#else
+    return "linux";
+#endif
+}