[mythtv] Switching MythMusic to use storage groups

[Paul Harrison]

> Paul,

> 
> Just quick q:
> When user removes some dirs with music and rescans - I see all music_* 
> tables are synced except
> -music_albumart
> -music_directories
> It this by design, work-in-progress or bug?
> thx
> 

It's a bug that has been there for a long while. We've never cleaned those up
properly. Embedded images get removed from the DB but not from the on disk
cache and the directory images and directory ID's don't get removed from the
DB at all. 

I'll add it to my list of things to look at.

Paul H.