Lagt till get_y_speed i alien_mk3. Nu ska vi bara lägga till
rörelsemönstret där.
Merge branch 'backup' of https://github.com/nhkim91/TDDC76-Projekt-SI.git into backup
Merge branch 'backup' of
https://github.com/nhkim91/TDDC76-Projekt-SI.git into backup

Conflicts:
	highscore.txt