Merge branch 'master' into lilypond/translation

* master: (39 commits)
  Final (?) update.
  Update from Francisco.
  GDP: NR 4 Reintegrate section from LM
  brown paper bag typo.
  add snippet links.
  Reinstate commented-out parts.
  Update for NR 1.6
  Update from Jonathan.
  Layout nitpicks for notime fragment option.
  Typo.
  Another pass on expressive.itely
  Work around 'make web-clean' madness
  Disable docs compilation in input/manual
  Add maximumFretStretch to list of properties read by Fretboard_engraver
  Added music examples to common chords table
  Update fret diagrams in fretted-strings.itely
  Correct tablatureFormat definition.
  LSR: Update.
  Change references to fret diagrams in changing-defaults.itely
  Rewrite fret diagrams portion of fretted-strings.itely
  ...