Porting UML diagrams to VPP; Code review; Minor refactoring/formatting; Adding Javadoc
Merge branch 'master' into arch

Conflicts:
	.gitignore
Vorschlag Architektur Persistenz/Domain erstellen
Fixing of minor bugs found while implementing test cases
Testkonzept verfassen
Minor refactoring in DatabaseHelper; Adding Configuration domain
Merge branch 'arch'