Improve Show handling
Since we now have a basic information extraction, we need to allow applications to list shows.
As per #165 (closed), we need to provide an "Unknown Show" to group all shows without a name. However, we need to be able to filter out this unknown show (as it may not contain anything). We also need to provide the same "is_present" handling as we do for artists & albums.
- Add unknown show support
nb_episodefield in the Show table
is_presentsupport to shows & show episode
- Add shows to the sample tests
Add a UNIQUE constraint on show_id/episode_number/season_number