Merge pull request #19 from Olyol95/master

Subgroup2
Merge pull request #23 from Olyol95/Subgroup1

Subgroup1
Merge pull request #25 from Olyol95/Subgroup2

Merge pull request #19 from Olyol95/master
Merge pull request #26 from Olyol95/master

Subgroup3
added basic command handling for main menu and exit button that had been
removed
Merge pull request #27 from Olyol95/Subgroup3

Subgroup3
Merge pull request #28 from Olyol95/master

Subgroup1