Merge branch 'master' into lilypond/translation

* master:
  Grace defaults for Script and AccidentalCautionary
  Documentation: Fix warnings in html
  Update word counts automatically with translations-status.py
  LSR: update.
  Rearrange stubs for future doc work.
  lilypond-book: Generate valid HTML 4.01 Transistional
  Fix @warning{} box.
  Add stub.