Reenabled solr in the sunspot.yml config file.
Added the film_festival_edition model. Changed the association between works and film_festival, to works and film_festival_editions, changed the WorkFilmFestival model and the create_work_film_festival migration, changing the film_festival_id to film_festival_edition_id.
Removed the works/film_festival_fields partial and added the works/film_festival_edition_fields partial instead.