Change tweaks, remove one warn, order imports.
Change tidy up of other warnings, mismatched types, typos, a strange arg issue with deepcopy, and PEP8.
Bug fix, bad key in get_item for TVInfoSocialIDs.
Fix ambiguities of `show` used in sg versus external uses.
Change add cast, crew type mappings
Change only take Main Actors, Hosts, Interviewers, Presenters.