* aclocal.m4: Regenerate.

* aclocal.m4: Regenerate.

* config.hh.in:
* config.make.in:
* stepmake/aclocal.m4: Cleanups and more conventional naming for
datadir ($prefix/share), package_datadir ($prefix/$package), and
local_package_datadir ($prefix/$package/$version).

* make/lilypond-vars.make:
* scripts/ly2dvi.py:
* scripts/lilypond-book.py:
* scripts/mup2ly.py:
* scripts/midi2ly.py: use local_package_datadir iso datadir.

* GNUmakefile.in: build_datadir without version.

* lily/main.cc: Datadir cleanup.

* lily/text-item.cc (lookup_text):
* lily/music-output-def.cc (print_smob):
* lily/mensural-ligature.cc (brew_molecule):
* lily/beam-quanting.cc (score_slopes_dy, score_forbidden_quants):
Fix warnings.