[2014] Adding hands-on javascript behavior to submission form for this year's hands-on type
[Hardcoded tags] Adding fixed submission tag pool and expiring old tags
[hardcoded tags] Changing add tag behavior on submission form. Not ready yet
[hardcoded tags] Now it loads tags that were already registered when editing
[hardcoded tags] And it also removes tags, when clicked
[hardcoded tags] Making the tag counter work
[prerequisites] Adding prerequisite to sessions. Issue #131