(refs #198)Allow create group by normal users.
Rename CreateRepositoryController to CreateController.
(refs #198)Allow group editing by group members.
(refs #241)Work for specifying group manager
(refs #241)Add validation for create / edit group form.
(refs #241)Group management improvement is completed in user side
(refs #241)Remove unnecessary code
(refs #241)Checkbox for manager is replaced with toggle buttons
(refs #241)Fix group creation / edition form presentation
Merge branch 'improve-group'