Merge pull request #67 from Gruppe01/gui-Mainscreen

Gui mainscreen
time stamp fix
minor fix
Fixed getAvailableRooms
Commit
Merge branch 'master' of https://github.com/Gruppe01/EXPHIL03 into gui-Mainscreen
minor fix
Merge branch 'master' of ssh://git@github.com/Gruppe01/EXPHIL03.git
Fix
Merge remote-tracking branch 'origin/master'
simon
Merge branch 'master' of https://github.com/Gruppe01/EXPHIL03 into gui-Mainscreen
Many changes made