[musicdb] cosmetic: shift GetSong
[musicdb] cosmetic: default values
[musicdb] cosmetic: delete unused function
[musicdb] cosmetic: missing whitespace
[musicdb] cosmetic: fix some constness cosmetics
[musicdb] cosmetic: tidy up musicdatabase.h
[musicdb] cosmetic: whitespace removal
[musicdb] cosmetic: remove unused parameter from GetSongFromDataset
[musicdb] cosmetic: use ExecQuery for UpdateSong
[musicdb] cosmetic: adds an UpdateSong() wrapper for public use, and use it in JSON-RPC
[musicdb] cosmetic: tidy up the song table definition and GetSongByFileName
[musicdb] cosmetic: have (Update|Add)Song should take the constructed artist string rather than the vector of artists
[musicdb] cosmetic: tidy up songview
[musicdb] fix: scanner can't be stopped
[musicdb] fix: album xml reader looks at wrong node
[musicdb] fix: make the guidialog discography use artist id instead of name
allows us to deal with duplicate named albums from multiple artists
[musicdb] fix: make sure we pass the progress dialog into UpdateDatabase*Info so user gets prompted on manual lookups
[musicdb] make getsongfromdataset take an sql record
[musicdb] make the dataset readers take offsets to allow splitting cartesian joins
[musicdb] Adds album and song artist views, and move GetAlbumArtistCreditFromDataset -> GetArtistCreditFromDataset for re-use