* 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.
* src/taalgos/dotty.cc, src/taalgos/dotty.hh: Add an interface
similar to that of tgba/dotty.hh, even if we have to ignore
most options.
* src/taalgos/tgba2ta.cc, src/taalgos/tgba2ta.hh: Add an option
to display the intermediate automaton with explicit stuttering
transitions, for the purpose of making demonstrations.
* src/tgba/tgbagraph.hh: Tweak the file so that SWIG can
read it.
* wrap/python/spot.py: Add wrappers for testing automata.
* wrap/python/spot_impl.i: Fix support for
atomic_prop_collect_as_bdd, and include a few more files.
* wrap/python/tests/testingaut.ipynb: New file.
* wrap/python/tests/Makefile.am: Add it.
