* lily/include/context.hh (class Context): make members protected.

* lily/include/context.hh (class Context): make members protected.
(children_contexts): new accessor function.

* lily/include/translator.hh (class Translator): make
daddy_context_ protected.
(class Translator): clean up.

* lily/include/context.hh (class Context): make daddy_context_
private.

* lily/lyric-engraver.cc (get_voice_to_lyrics): recursively go
higher for finding Voice. (backportme)

* lily/include/context.hh (class Context): remove
find_context_below() as a method.

* Documentation/user/notation.itely (The Lyrics context): add note
about manual durations

* ly/chord-modifiers-init.ly (blackTriangleMarkup): use TeX-math
encoding.

* scm/output-tex.scm (text): dump \inputencoding{} for text.