get_raw_songs and album_id

[jonathanchristison]

get_raw_songs query the directory id not the album id, this means its not possible to load songs from an album

I've fixed this on my own branch with a hack jonathanchristison@4c465f1 but I don't know enough about the structure of the mopidy-subidy, mopidy or py-sonic to make a nice fix, i just know it fixes it for my particular case

[jonathanchristison]

Actually this totally breaks navigating by file, i think the issue here is what the search returns is a directory and not an album.