Fixes#56.
* src/bin/common_aoutput.cc, src/bin/common_aoutput.hh,
src/bin/dstar2tgba.cc: Implement it.
* src/bin/autfilt.cc, src/bin/ltl2tgba.cc, src/bin/ltldo.cc,
src/bin/randaut.cc: Fix main() to catch exceptions from the
constructor of the automaton printer as well.
* src/tgbatest/randaut.test: Add a test case.
* doc/org/oaut.org: Document it.
Get rid of the output in Spot's format.
This finally fixes#1.
* src/tgbaalgos/save.cc, src/tgbaalgos/save.hh: Delete.
* src/tgbaalgos/Makefile.am: Adjust.
* src/ltlvisit/contain.cc: Remove useless includes.
* src/bin/dstar2tgba.cc, src/bin/common_aoutput.cc,
src/bin/common_aoutput.hh: Remove the "Spot" output.
* doc/org/dstar2tgba.org, doc/org/ioltl.org,
doc/org/ltl2tgba.org, doc/org/oaut.org: Update doc.
* NEWS: Mention that Spot i/o is gone.
* src/tgbatest/randtgba.cc: Output in HOA.
* src/tgbatest/randtgba.test: Use randaut instead of
randtgba.
* wrap/python/spot.i: Do not provide binding for save.hh
* src/bin/common_trans.cc, src/bin/common_trans.hh: New files,
extracted from...
* src/bin/ltlcross.cc: ... here, so that ltldo can use them.
* src/bin/ltldo.cc: New file.
* src/bin/Makefile.am: Adjust.
* src/bin/common_aoutput.cc, src/bin/common_aoutput.hh: Make
it possible to add new statistics.
* doc/org/ltldo.org: New file.
* doc/Makefile.am, doc/org/tools.org: Adjust.
* src/bin/man/ltldo.x: New file.
* src/bin/man/Makefile.am: Adjust.
* src/bin/man/ltlcross.x, src/bin/man/ltlfilt.x: Mention ltldo(1).
* src/tgbatest/ltldo.test, src/tgbatest/ltldo2.test: New files.
* src/tgbatest/Makefile.am: Add them.
* NEWS: Mention ltldo.
* src/bin/common_aoutput.hh, src/bin/common_aoutput.cc: Adjust to
support three kind of statistics printer, depending on whether the
tool input formulas, automata, or nothing.
* src/bin/randaut.cc, src/bin/autfilt.cc: Adjust.
* src/bin/ltl2tgba.cc: Use the common_aoutput printers. The
--csv-escape option disappeared along the way, but it was not honored
anyway...
