adding tests for collection validation
Merge branch 'feature/collectionv2' of github.com:avalonmediasystem/avalon into feature/collectionv2

Conflicts:
	spec/models/media_object_spec.rb
not necessary
validate presence of collection
Merge branch 'feature/collectionv2' of github.com:avalonmediasystem/avalon into feature/collectionv2
commiting what i have so far