Core is realy wait for work and test

Aliens create, wavetrace work, towers build, aliens move - thats all by
now.
I think it is time to write Graphic and Network modules.

game_data.cpp

@@ -4,4 +4,6 @@ Game_Data::Game_Data(Map *mapp, QObject *parent) :
     QObject(parent)
 {
 	map = mapp;
+	curWave = 0;
+	missingAliens = 0;
 }