* Documentation/user/examples.itely (Transcription of mensural

	* Documentation/user/examples.itely (Transcription of mensural
	music): Added more comments in .ly source.  Suggest to remove
	Forbid_line_break_engraver to allow line breaking at all bars.

	* Documentation/user/instrument-notation.itely (Ancient
	articulations): Updated @refbugs regarding episem.

	* Documentation/user/instrument-notation.itely (Gregorian square
	neumes ligatures): Added \augmentum dots.  Updated @refbugs
	regarding \augmentum.

	* input/test/gregorian-scripts.ly: Removed obsolete TODOs.

	* input/test/ligature-vaticana.ly: Added \augmentum dots.  Updated
	comment.

	* lily/vaticana-ligature-engraver.cc: Added TODO comment for
	\augmentum dots.

	* ly/gregorian-init.ly: Added \augmentum macro.