Handle aktiviteter with >1 difficulty
Handle all invalid dates
Add temporary Cabin model
Add relation to cabin
Import cabin-groups
Handle forening + cabin relation in aktiviteter edit view
Handle forening + cabin relation in aktiviteter index view
Handle forening + cabin relation on public pages
Add __unicode__ method to aktiviteter.Cabin
Add Cabin relation when importing aktiviteter
Assume medium difficulty if not specified
Merge branch 'aktiviteter-import-cabin'