Allow adding Plex playlists to script database

[MoeFwacky]

I'd like to be able to scan a playlist created in plex and have the script treat it like a TV show (advancing once with each scheduled playback). I'm thinking of this as an option to treat a group of potentially unrelated movies or other media as an episodic series for scheduling.

I imagine this is something you'd probably want to wait until after Django for.

[justinemter]

Yes, I like this. I remember you mentioning this before.