hpi-swt2/event-und-raumplanung — pull request #202 by kaozente (2014-12-17 16:33:09+00:00)
Title: Biber (GroupLeaders)

Implements Group Leaders #41
Added Membership Model to relate users + groups (with extra isLeader attribute)
Group Leaders can assign / unassign users from Groups and rename the group
Only admins can promote / degrade users