Merge pull request #14 from WOYM/master

Aktualisierung
WhateverFix #129
Merge pull request #127 from alueck/master

Klasse für Klassenteams und Anpassungen der Remove-Methoden in Activity
Merge pull request #130 from JurSch/commandhandler

CommandHandler #129
Merge pull request #7 from WOYM/master

merge