(Steve Shorter)
	Bar 6: correct 2nd bass dotted quarter note, beat 2.5->beat 2
	Bar 18: correct e->g in last eight note in treble
(Javier Ruiz-Alma)
	update to v2.6.1
	minor cosmetics
	Bar 21: add prallup to first treble note
	Bar 23: add prallup to the 'a' in first voice
Close #12
Merge branch 'bwv988aria' of https://github.com/dominicus/The-Mutopia-Project
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