Fixed Trakt.merge_collected when updating episode 'is_collected' states
Added 'parent' to SyncBase
Renamed PlexMedia 'key' to 'rating_key', added new 'key' which includes the parsed_guid key, added 'parent' to PlexEpisode
Added episode syncing to [sync.push]
Updated [core.trakt] response parsing and fixed when 'plugin_version' and 'media_center_version' is sent.
[sync.push] now sends movie artifacts to trakt