Merge pull request #23 from alueck/master

Änderungen an Datenklassen und Persistenzschicht
Merge.
Merge Pullrequest #24
Merge pull request #24 from alueck/master

Startup Servlet für die Datenbank
Clean update of teachers and locations, deleted spring from pom and implemented validators
Merge pull request #34 from tihansen/master

Clean update of teachers and locations, deleted spring from pom and impl...
Merge pull request #1 from WOYM/master

Merge timetable/master