Refactoring and flexibility changes

* Split game module into game and game_interface
* Move core_lib to corelib
* Move miniwindow to corelib
* Introduce init.lua script for initializing the client, giving much more flexibility
* OTClient is no longer Application derived and is much simpler

src/framework/net/connection.cpp

@@ -41,7 +41,7 @@ Connection::Connection() :
 
 Connection::~Connection()
 {
-    assert(!g_app->isTermianted());
+    assert(!g_app.isTermianted());
     close();
 }