[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] 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] make getsongfromdataset take an sql record
[musicdb] make the dataset readers take offsets to allow splitting cartesian joins
[musicdb] add getalbum function and the relevant views/changes
[musicdb] demise getalbuminfosongs/setalbuminfosongs and roll up the functions
[musicdb] add functions and tidy functions for dynamically updating albums
[musicdb] use triggers for database consistency instead of deletes
[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