Added user administration controlled by institution
Added new workgroup model
Added method for connecting siglas to workgroups
Added methods to distinguish and deal with holing records
Update fr.yml
Merging prints (post generate holdings) and ms in one dataset; adjusting user rights; remove holdings from display
Merge branch 'User-Rights-Management' of https://github.com/rism-ch/muscat into User-Rights-Management
changed ability class
Merge branch 'User-Rights-Management'

Conflicts:
	app/admin/user.rb
	db/schema.rb
	lib/solr_search.rb