[musicdb] cosmetic: remove CSongMap and just use an std::map instead
[musicdb] cosmetic: make the path / filename index unique
[musicdb] cosmetic: Add HasArtistInfo and make GetArtistInfo use the views, for consistency with albums
[musicgui] cosmetic: reroll the album/artist GUI to make them much cleaner and more logical
[musicdb] cosmetic: shuffle some code to a place where it makes more sense
[musicdb] cosmetic: separate tag scanning out into a separate function
Merge pull request #2568 from night199uk/cosmetics

[musicdb] Cosmetics from the original MusicBrainz patch