* src/tgbaalgos/dotty.cc, src/tgbaalgos/dotty.hh: Add an options
parameter.
* src/bin/randaut.cc, src/bin/autfilt.cc, src/bin/dstar2tgba.cc,
src/bin/ltl2tgba.cc, wrap/python/ajax/spot.in: Use it.
* src/tgbatest/det.test, src/tgbatest/dstar.test,
src/tgbatest/ltl2tgba.cc, src/tgbatest/monitor.test,
src/tgbatest/neverclaimread.test, src/tgbatest/tgbaread.test,
src/graphtest/tgbagraph.test: Adjust
because automata are now output horizontally.
* NEWS: Mention the change.

* src/bin/autfilt.cc: add option --uniq.
* src/bin/randaut.cc: add option --uniq.
* src/tgbatest/uniq.test: Test it.

* src/bin/randaut.cc: Fix memory leak.
* src/bin/autfilt.cc: Add a --merge-transitions option.
* src/tgbatest/readsave.test: Rewrite using randaut and autfilt.

* src/ltlenv/defaultenv.hh, src/ltlenv/defaultenv.cc (require): Return
an atomic_prop*, not a formula*.
* src/bin/randaut.cc, src/bin/randltl.cc, src/ltlvisit/apcollect.cc,
src/tgbatest/ltl2tgba.cc, src/tgbatest/randtgba.cc: Do not cast
the return of require().

* src/bin/randaut.cc, src/bin/man/randaut.x: New files.
* src/bin/Makefile.am, src/bin/man/Makefile.am: Adjust.
* src/tgbaalgos/randomgraph.hh, src/tgbaalgos/randomgraph.cc:
Add an option to output state-based acceptance, and update
the TGBA properties.
* src/tgbatest/randaut.test: New test.
* src/tgbatest/Makefile.am: Add it.