* lily/dynamic-engraver.cc (process_music): take dynamic direction

* lily/dynamic-engraver.cc (process_music): take dynamic direction
from ^_ for crescendi. Idem for slurs and phrasing slurs.

* ly/grace-init.ly: add-to-grace-init: function to portably add
settings to \grace.

* lily/dynamic-engraver.cc (process_music): finish (de)crescendo
if we get an absolute dynamic event.

* lily/time-signature-engraver.cc (process_music): warn for \time 5/5

* lily/source-file.cc (get_line): oops. All line numbers were off
by 2. Fix that.