füge Menu-update hinzu
Merge branch 'master' of https://github.com/Lusito/GameDevWeek

Conflicts:
	gdx-test/src/main/java/de/hochschuletrier/gdw/ss14/sandbox/ui/LaserCatMenu.java
Füge allg. Menü-Basisklasse und MainMenu-Klasse hinzu
Merge branch 'master' of https://github.com/Lusito/GameDevWeek
Merge branch 'master' of https://github.com/Lusito/GameDevWeek

Conflicts:
	gdx-test/src/main/resources/data/skins/MainMenuSkin.json
Merge branch 'master' of https://github.com/Lusito/GameDevWeek