Merge branch 'master' into lilypond/translation

* master:
  Update from Carl.
  Policy update.
  Update from Andrew.
  Update from Carl.
  GDP: Process comments from JK
  Update from Carl.
  policy update.
  Policy update.
  minor stuff
  First pass at new chords.
  policy fix
  Update from Ralph.
  Change sacred head example.  (why on earth use \time 6/4 ?!)
  Extend example of shaped heads to show all pitches
  Added more todo items.