Merge pull request #15 from WOYM/master

Merge pull request #147 from tihansen/master
#154
Merge pull request #157 from tihansen/master

#154
#154
#150
Merge pull request #158 from alueck/master

Test hinzugefügt. CommandHandler-Test korrigiert. Javadoc ergänzt.
Merge pull request #16 from WOYM/master

Update
Merge pull request #159 from tihansen/master

#150
Merge pull request #11 from WOYM/master

Merge