added migration for missing fields od broadcast_formats, and hübsched up...
fixed tests of (admin::)broadcast formats
fixed events controller naming bug, improved admin views
runned migrations
removed unused debugging
deleted unused code
Merge pull request #252 from koelncampus/broadcast_formats-migrations

added migration for missing fields of broadcast_formats, and hübsched up...
Merge branch 'master' into add-functionality-to-broadcast-pages