New Features

Closes #6 - Add movie posters by folder
Closes #13 - Added the original_language collection filter and the show_filtered option to the plex and collections attributes
Added the show_unmanaged option to the plex attribute

Bug Fixes

Fixes #3 - original_title works for shows
Fixes #17 - MyAnimeList connection always said failed
Fixes #22 - added handling for multiple anime IDs
Fixes #24 - tvdb_show not working correctly