* src/hoaparse/Makefile.am, src/hoaparse/fmterror.cc,
src/hoaparse/hoaparse.yy, src/hoaparse/hoascan.ll,
src/hoaparse/parsedecl.hh, src/hoaparse/public.hh: New files.
* src/Makefile.am, configure.ac, README: Adjust.
* src/tgbatest/ltl2tgba.cc: Add a -XH option.
* src/tgbatest/hoaparse.test: New file.
* src/tgbatest/Makefile.am: Adjust.
* buddy/src/bddx.h: Add a bdd_from_int() function.