possibility for an admin to configure administration mail address
Merge branch 'develop-ak' of github.com:tkowark/hpi-hiwi-portal into develop-ak
tests + refactoring of configuration stuff
Merge branch 'develop-ak' of github.com:tkowark/hpi-hiwi-portal into develop-ak
cleaned up some tests
implemented imprint tests
added some usershelper tests
some more testing
tests for email validation
Merge branch 'develop-ak' of github.com:tkowark/hpi-hiwi-portal into develop-ak
tests
Merge branch 'develop-ak' of https://github.com/tkowark/hpi-hiwi-portal into develop-ak
Merge remote-tracking branch 'origin/develop' into develop-ak

Conflicts:
	app/views/students/show.html.erb
	config/locales/views/layouts/de.yml
	config/locales/views/layouts/en.yml
indentation fixes and other refactorings
made use of configurable administration email + some test stuff
default flash message to success
Admin navbar improvements
Merge branch 'develop-ak-flash' into develop-ak
fixed typo
Merge branch 'develop-ak' of https://github.com/tkowark/hpi-hiwi-portal into develop-ak