refactored students_controller#update a little
refactored students_controller#update a little
some more refactoring + testing
Merge remote-tracking branch 'origin/develop-ak' into develop
added more flexible language handling to user factory
Merge branch 'develop-ak' of https://github.com/tkowark/hpi-hiwi-portal into develop
Merge branch 'develop' of https://github.com/tkowark/hpi-hiwi-portal