[musicdb] remove album info table and merge into album
[musicdb] tidy up the info scanner and allow us to dynamically update albums
[musicdb] merge artist info and artist tables and demise getartistinfo etc
[musicdb] tidy up some song related stuff and ensure we get the artist credits when pulling a song
[musicdb] clear artist discography before getting the artist
[musicdb] Music Scanner updates
[musicdb] fix: remove unneeded rollbacktransaction
[musicdb] scan optimization - skip the scan if we don't find any music in the dir
[musicdb] fix artist fanart in infoscanner