Comment 2 for bug 1273625

These are the use cases I can currently see within the latest version of the music-app
- getting all music
- getting all artists
- getting all songs from one artist
- getting all albums from one artist
- getting all albums
- getting all songs for a given album
- getting all genres
- getting all songs of a given genre
- getting all covers from one artist
- getting the cover of a given album
- getting all covers for a given genre

For each of the use cases, sorting will be required as well.