* lily/lyric-phrasing-engraver.cc: move from

* lily/lyric-phrasing-engraver.cc: move from
new-phrasing-engraver.cc, remove old cruft (syllable-group,
lyric-phrasing-engraver.hh)

* lyric-align.ly: remove file

* scripts/convert-ly.py (FatalConversionError.func): add removal
rule for automaticMelismata

* ly/engraver-init.ly (ScoreContext): switch on
New_phrasing_engraver by default.

* lily/slur-engraver.cc (class Slur_engraver):
process_acknowledged_grobs -> process_music.
(try_music): signal melismata correctly.

* lily/lyric-extender.cc (brew_molecule): cleanup. Junk
word-space, right-trim-amount, and extend past right bound only
for note heads.

* lily/new-phrasing-engraver.cc (acknowledge_grob): add
lyric-extender support: add note-heads to the extender
automatically.

* lily/parser.yy: extender is now post_event.

* lily/accidental-engraver.cc (number_accidentals): remove
spurious warning about non-parent contexts.

* scm/define-grobs.scm (all-grob-descriptions): change clef -
staffbar distance.