* lily/vaticana-ligature-engraver.cc: bugfix: fixed programming

	* lily/vaticana-ligature-engraver.cc: bugfix: fixed programming
	error message "flexa-width undefined"

	* lily/vaticana-ligature-engraver.cc, lily/gregorian-ligature.cc,
	lily/include/gregorian-ligature.hh: print warning when ignoring
	head prefixes on flexa shapes

	* lily/vaticana-ligature-engraver.cc: bugfix: always add an extra
	space before a series of inclinatum heads

	* lily/vaticana-ligature-engraver.cc, lily/gregorian-ligature.cc,
	lily/include/gregorian-ligature.hh: junked AFTER_VIRGA; small
	cleanups

	* mf/parmesan-custodes.mf: redesigned custos; fixed stem length
	and char_box