Automatic participation is only enabled for open suites, #178
Added support for copying a group, #178
Adding the uploads folder.

The folder is needed to get all tests to pass when cloning the repo for
the first time.
Added support for closing groups, #178
Hiding closed groups, #178

Makes use of status on groups and hides closed groups in student
listings, student listings in suites and in search for groups.
Closed groups can be found through a tab on the group page and
when viewing a single student.
Merge branch 'soft-delete' into group-changes-178
Fix for bug that shows hidden subgroups, #178
Merge branch 'soft-delete-fix' into group-changes-178
Merge branch 'group-changes-178'