* src/tgbaalgos/postproc.cc: Move the count_state() function...
* src/priv/countstates.cc, src/priv/countstates.hh: ... in these
new files.
* src/priv/Makefile.am: Add them.
* src/saba/sabacomplementtgba.cc, src/tgba/tgbakvcomplement.cc,
src/tgbaalgos/minimize.cc: Use count_states() instead of
stats_reachable().
* configure.ac: Check for flags and fill CXXFLAGS and CFLAGS.
* iface/dve2/dve2.hh: Mark load_dve2 for export.
* src/eltlparse/Makefile.am, src/kripke/Makefile.am,
src/kripkeparse/Makefile.am, src/ltlast/Makefile.am,
src/ltlenv/Makefile.am, src/ltlparse/Makefile.am,
src/ltlvisit/Makefile.am, src/misc/Makefile.am,
src/neverparse/Makefile.am, src/priv/Makefile.am, src/saba/Makefile.am,
src/sabaalgos/Makefile.am, src/ta/Makefile.am, src/taalgos/Makefile.am,
src/tgba/Makefile.am, src/tgbaalgos/Makefile.am,
src/tgbaalgos/gtec/Makefile.am, src/tgbaparse/Makefile.am:
Remove $(VISIBILITY_CXXFLAGS) now that it is set globally.