* Documentation/user/refman.itely: bugfix: "Chord namess" ->

	* Documentation/user/refman.itely: bugfix: "Chord namess" ->
	"Chord names"; added table with input syntax for solesmes neumes
	table; added some words about rationale on input syntax design

	* lily/gregorian-ligature-engraver.cc,
	lily/vaticana-ligature-engraver.cc, lily/vaticana-ligature.cc,
	lily/include/gregorian-ligature.hh: bugfix: horizontal head
	alignment of Pes Initio Debilis