All sheetmusic updated again

I have finally switched from my custom bagpipe.ly to the one included in the Lilypond distribution. This meant moving some stuff from bagpipe_new.ly to bagpipe_extra.ly in https://github.com/svenax/bagpipemusic. It didn’t really affect any of the tunes in the archive but I regenerated all the scores anyways to be sure everything worked as intended.

I think this is a good change since it will keep my scores from diverging too much from the standard notation. It may also work as an incentive to send updates to the Lilypond project more often.