Use persistent sessions. Fixes #653.
Make cookies valid for all paths
Avoid extracting mentions when comment is empty. Fixes #788.
Restrict access to future exercises (teams). Fixes #789.
Delete comments. Fixes #645
Fix edit nit endpoint
<strike>Whitesnake</strike> Whitespace
Allow creator to add/remove team members
Allow users to leave their team
Merge pull request #792 from Tonkpils/edit-team

Edit team
Add test for delete comment endpoint