Adds full metadata editing for Collections (same DC fields as GenericFiles)  Fixes hydra-editor style partials in views/records.
refs gwu-libraries/gw-sufia#82
refs gwu-libraries/gw-sufia#25
Merge pull request #545 from projecthydra/moar_collection_metadata

Adds full metadata editing for Collections (same DC fields as GenericFiles)
Makes generic_files edit and show views rely on shared records/edit_fields and records/show_fields.

Conflicts:
	app/views/records/show_fields/_creator.html.erb
Merge pull request #547 from projecthydra/generic_files_hydra_editor

Generic files uses shared edit/show field partials
Add Twitter card/Opengraph meta tags for rich social media linking to generic file show view