refs #587, adds FITS delegations to GenericFile model
refs #587, adds FITS delegations to GenericFile model

samvera/hyrax,ndlib/scholarsphere,jeremyf/sufia,zhang4952/scholarsphere,jeremyf/sufia,ndlib/scholarsphere,samvera/hyrax,samvera/hyrax,zhang4952/scholarsphere,zhang4952/scholarsphere,ndlib/scholarsphere,samvera/hyrax,zhang4952/scholarsphere