* bin/common_hoaread.hh (hoa_processor): Add a abort_on_error
option.
* bin/autcross.cc: Use it.
* tests/core/autcross4.test: Add many more error cases to improve
coverage.
* bin/common_setup.cc, bin/common_setup.hh: Define a protected_main()
function that deal with exceptions.
* bin/autcross.cc, bin/autfilt.cc, bin/dstar2tgba.cc, bin/genaut.cc,
bin/genltl.cc, bin/ltl2tgba.cc, bin/ltl2tgta.cc, bin/ltlcross.cc,
bin/ltldo.cc, bin/ltlfilt.cc, bin/ltlgrind.cc, bin/ltlsynt.cc,
bin/randaut.cc, bin/randltl.cc: Use it for all tools.
This also fixes some empty lines and unsorted options
that appeared in some tools.
* tests/sanity/bin.test: Ensure this is done.
* bin/README: Add a new paragraph about this.
* bin/autcross.cc, bin/ltlcross.cc: Move the
output options in their own section.
* bin/common_color.cc: Assume color options are
in group -15.
* bin/common_finput.cc, bin/common_finput.hh:
Add a headless variant.
* bin/genltl.cc, bin/ltlfilt.cc, bin/ltlgrind.cc,
bin/randaut.cc, bin/randltl.cc: Do not force the
children groups, so that the options are correctly sorted.
* bin/ltlsynt.cc: Add missing groups.
