added mentor section
fixed wrong flash text
small codereview
added ability to delete mentor teams
added theme line
removed tutor group, use rkg instead
added group overview
now a page for handling who are in what groups exists
group overview now contains links to the individual users
added space
added admin menu for groups
renamed user_add_group to group_add_user, and user_remove_group to group_remove_user
admin now uses the group functions from usermanager
Merge branch 'iss68'
theme is only listed when there is one
The theme field is always shown to make tutors aware
Merge branch 'master' into iss78