* src/twaalgos/dtgbasat.cc (sat_minimize): Use any arbitrary
acceptance condition passed via the "acc" option.
* src/twa/acc.hh (mark_t::max_set): New method.
* src/tests/satmin2.test: Add two test cases with DRA as input
and DSA as output.

* src/twa/acc.cc: Here.
* src/tests/acc.test: Adjust.

When the reference acceptance condition is complex enough, some
accepting SCCs may not use all acceptance sets.  In that case
we don't have to encode all possible histories for this SCC.

* src/twaalgos/dtgbasat.cc: Improve the encoding by omitting
histories involving sets that are not used in a reference SCC.

This is still missing tests.

* src/bin/autfilt.cc: Add a --sat-minimize option.
* src/misc/optionmap.cc, src/misc/optionmap.hh: Allow passing strings.
* src/twa/acc.cc, src/twa/acc.hh: Add helper functions needed
by the SAT-encoder.
* src/twaalgos/complete.hh: Typos.
* src/twaalgos/dtbasat.hh: Adjust comment.
* src/twaalgos/dtgbasat.cc, src/twaalgos/dtgbasat.hh: Generalize
to take the target acceptance as input.
* src/twaalgos/postproc.cc, src/tests/ltl2tgba.cc: Adjust calls.
* src/twaalgos/sbacc.cc, src/twaalgos/sbacc.hh: Don't pass
the pointer by reference.
* src/tests/acc.cc, src/tests/acc.test: More tests
for the acceptance helper function.

and make it easier to extend and use.

* src/twaalgos/postproc.hh, src/twaalgos/translate.cc,
src/twaalgos/translate.hh: Incorporate the Unambiguous option
with the other preferences.  It's cleaner this way, and the
previous setup did not work well with Python.
* src/bin/ltl2tgba.cc: Adjust to this change.
* wrap/python/spot.py (translate): Rewrite.
* wrap/python/tests/automata.ipynb: Adjust existing cases, and
add more as well as some comments.

* src/twaalgos/translate.cc, src/bin/ltl2tgba.cc: Do not assume that
unambiguous is incompatible with deterministic.

Producing state-based acceptance is now part of the postprocessing
routines.  That means we can more easily simplify automata with
state-based acceptance (using autfilt -S --small --high, for instance)
and as as side-effect, ltl2tgba can produce GBA.  However the result of
ltl2tgba -S is often larger than that of ltl2tgba -B.

* src/twaalgos/postproc.cc, src/twaalgos/postproc.hh: Implement
the SBAcc option.
* src/bin/common_post.cc, src/bin/common_post.hh: Implement -S.
* src/bin/autfilt.cc, src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc,
src/bin/ltl2tgta.cc, src/bin/ltldo.cc: Adjust.
* src/tests/sim3.test: Augment test case.
* NEWS, doc/org/ltl2tgba.org, doc/org/autfilt.org: Document it -S.

* src/twaalgos/minimize.cc, src/twaalgos/safety.cc,
src/twaalgos/safety.hh: Adjust.
* src/tests/wdba2.test: More tests.

* src/twaalgos/simulation.cc, src/twaalgos/simulation.hh: Adjust
to work on TωA.  This only require separate acceptance sets.
* src/tests/sim3.test: New test.
* src/tests/Makefile.am: Add it.

* src/bin/ltldo.cc: Default to generic acceptance.
* src/tests/ltl2dstar.test: Add a test.

* src/twaalgos/sepsets.cc, src/twaalgos/sepsets.hh: New files.
* src/twaalgos/Makefile.am: Add them.
* src/twa/acc.hh (get_acceptance): Add a non-const version.
* src/bin/autfilt.cc: Add the --separate-sets option.
* src/tests/sepsets.test: New file.
* src/tests/Makefile.am: Add it.

* src/twaalgos/sccinfo.cc, src/twaalgos/sccinfo.hh
(determine_unknown_acceptance): New function to call explicitly
in case one want to know whether the accepting/rejecting status
of all SCCs regardless of the acceptance.
* src/twaalgos/dotty.cc src/twaalgos/sccfilter.cc,
src/twaalgos/sccfilter.hh: Use it.
* src/tests/unambig.test, src/tests/sccdot.test: Add more tests.
* doc/org/oaut.org: Adjust doc for --dot=s, orange is not output
anymore.

Note however that scc_info does not provide a precise accept/reject
characterization for SCCs when using Fin acceptance.  However whenever
it tells that an SCC is rejecting, scc_filter_states() may safely remove
it.

* src/twaalgos/sccfilter.cc (scc_filter_states): Allow on any TωA.
(scc_filter): Only use acceptance simplifications on TGBA.
* src/tests/unambig.test: Add a co-Büchi test.

* doc/org/.dir-locals.el, doc/org/init.el.in: Use 'B' instead of 'b' for
default Dot output.
* doc/org/oaut.org: Adjust.
* NEWS, doc/org/ltl2tgba.org: Document -U.
* src/bin/common_post.cc, src/bin/ltl2tgba.cc: Fix location of help text
for -U.

* src/twaalgos/ltl2tgba_fm.cc: Fix the PSL operators.
* src/tests/unambig.test: Add more tests.

* src/twa/twagraph.cc, src/twa/twagraph.hh (create_formula_namer,
release_formula_namer): New functions.
* src/twaalgos/ltl2tgba_fm.cc: Use it.

* src/bin/common_aoutput.cc: Add --check=unambiguous.
* src/twa/twa.hh: New unambiguous property.
* src/twaalgos/hoa.cc: Print it.
* src/twaalgos/ltl2tgba_fm.cc: Set it.
* src/twaalgos/isunamb.cc, src/twaalgos/isunamb.hh
(check_unambiguous): New function.
* src/tests/unambig.test: More tests.

* src/twaalgos/isunamb.hh, src/twaalgos/isunamb.cc: New files.
* src/twaalgos/Makefile.am: Add them.
* src/tests/unambig.test: New file.
* src/tests/Makefile.am: Add it.
* src/bin/ltlcross.cc: Record whether each produced automaton is
ambiguous.
* src/bin/autfilt.cc: Add a --is-unambiguous option.
* NEWS: Mention it.

* src/twaalgos/ltl2tgba_fm.hh, src/twaalgos/ltl2tgba_fm.cc: Implement
generation of unambiguous automata.
* src/tests/ltl2tgba.cc: Add option -fu to test it.
* src/bin/common_post.cc: Adjust the group of options so we can easily
add more from ltl2tgba.cc.
* src/bin/ltl2tgba.cc: Add support for -U and --unambigous.
* src/twaalgos/translate.cc, src/twaalgos/translate.hh: Add support
for Unambiguous.
* src/tests/ltlcross.test, src/tests/ltlcross2.test: Test both
bin/ltl2tgba and tgbatest/ltl2tgba.
* NEWS: Mention the change.

* src/ltlvisit/mutation.cc: Do not bindly rewrite e[]->f and
e<>->f as e, since e is not a valid PSL formula.  Use !{e}
and {e} instead.  Also fix a memory leak in the handling of
bunops, discovered while testing the previous change.
* src/tests/ltlgrind.test: Add a test case.

* doc/org/ioltl.org: Add an example with xargs -0.
* src/bin/common_aoutput.hh (statistics): Do not print nullptr if %F is
empty.

* src/bin/common_output.cc: Add option -0.
* src/tests/ltlfilt.test: Test it.
* NEWS: Document it.

* src/twa/twa.hh: Support this new property.
* src/twaalgos/stutter.cc: Set it if needed.
* src/twaalgos/hoa.cc: Output it.
* src/tests/stutter-tgba.test: More tests.

This currently only allows extra check for stutter invariance.

* src/bin/common_aoutput.cc: Add check option,
and test stutter invariance.
* src/twaalgos/stutter.cc, src/twaalgos/stutter.hh
(check_stutter_invariance): New function.
* src/tests/stutter-tgba.test: Test it.

This addresses the easy part of #79.

* src/twaalgos/postproc.cc: If the input is already BA and we want a BA
as output, do not try the transition-based simulation only to
degeneralize the result.
* src/tests/optba.test: New file.
* src/tests/Makefile.am: Add it.

* src/hoaparse/hoaparse.yy: Do not check initial alternating state
number until we support alternation.
* src/tests/hoaparse.test: Add a test case.

* src/twaalgos/dotty.cc: Add an option (e) to force elliptic shape, and
a heuristic to choose between circle and ellipse by default.
* src/bin/common_aoutput.cc, src/bin/dstar2tgba.cc: Document 'e'.
* src/taalgos/dotty.cc: Ignore 'e'.
* wrap/python/spot.py (setup): Do not force circular states.  The
default should be fine.
* src/tests/det.test, src/tests/dstar.test, src/tests/monitor.test,
src/tests/neverclaimread.test, src/tests/readsave.test,
src/tests/sccdot.test, src/tests/tgbagraph.test: Adjust expected
results.
* NEWS: Adjust.

* src/twaalgos/dotty.cc: Add option 'B'.
* src/taalgos/dotty.cc: Ignore it.
* src/bin/common_aoutput.cc, src/bin/dstar2tgba.cc: Document it.
* wrap/python/spot.py (setup): Use it by default, and rewrite
the function to be a bit more flexible.
* wrap/python/tests/automata-io.ipynb, wrap/python/tests/automata.ipynb,
wrap/python/tests/piperead.ipynb, wrap/python/tests/randaut.ipynb,
wrap/python/tests/testingaut.ipynb: Use setup() everywhere.

Fixes #78.

* src/twaalgos/dotty.cc: Add option '1'.
* src/taalgos/dotty.cc: Ignore '1'.
* src/bin/dstar2tgba.cc, src/bin/common_aoutput.cc: Document it.
* src/tests/readsave.test: Test it.

* src/bin/autfilt.cc: Fix it.
* src/tests/isomorph.test: Test it.

* src/hoaparse/public.hh, src/hoaparse/parsedecl.hh,
src/hoaparse/hoascan.ll, src/hoaparse/hoaparse.yy: Implement this new
interface.
* wrap/python/spot.py (automata): Use it when the argument contains
a newline.
* wrap/python/tests/automata-io.ipynb: Test it.

* iface/ltsmin/README: here.

* .cvsignore, bench/.cvsignore,
bench/emptchk/.cvsignore, bench/emptchk/models/.cvsignore,
bench/ltl2tgba/.cvsignore, buddy/.cvsignore,
buddy/doc/.cvsignore, buddy/examples/.cvsignore,
buddy/examples/adder/.cvsignore,
buddy/examples/bddcalc/.cvsignore,
buddy/examples/bddtest/.cvsignore,
buddy/examples/calculator/.cvsignore,
buddy/examples/cmilner/.cvsignore,
buddy/examples/fdd/.cvsignore,
buddy/examples/internal/.cvsignore,
buddy/examples/milner/.cvsignore,
buddy/examples/money/.cvsignore,
buddy/examples/queen/.cvsignore,
buddy/examples/solitare/.cvsignore,
buddy/src/.cvsignore, buddy/tools/.cvsignore,
doc/.cvsignore, iface/.cvsignore,
src/.cvsignore, src/ltlast/.cvsignore,
src/ltlenv/.cvsignore, src/ltlparse/.cvsignore,
src/ltlvisit/.cvsignore, src/misc/.cvsignore,
src/sanity/.cvsignore, src/tests/.cvsignore,
src/twa/.cvsignore, tools/.cvsignore,
wrap/.cvsignore, wrap/python/.cvsignore,
wrap/python/tests/.cvsignore: here.

*  src/tests/parse_print_test.cc: here.