School management
Update school data and groupnames
delete schools
Security fixes (when removing users from school/groups)
Merge branch 'Development' of https://github.com/oSoc14/code9000 into Development
Bugfix: Group-view, javascript cleanup
Delete confirmation and cascade rules added
#14 Various security fixes, added language option in user settings page
Merge branch 'Development' into frontend_implementation

Conflicts:
	app/views/group/editGroups.blade.php
	app/views/group/listGroups.blade.php
	app/views/user/edit.blade.php