- Added method getStudiengang to class Studiengang2 to get a studiengang from pk
- Added method addDistinct to class DB_Model to add the distinct clause to a query
- Added a route rule to let to call Studiengang2 controller with the urn /api/v1/organisation/studiengang/
- Moved Kontank controller to /api/v1/person
- Kontakt controller has two method getKontakt and postKontakt