* spot/priv/satcommon.cc, spot/priv/satcommon.hh: Make it possible to
set the log file without setting the environment variable. Adjust
print_log to take the input state and print it as a new column.
* spot/twaalgos/dtbasat.cc, spot/twaalgos/dtwasat.cc: Adjust all
calls to print_log. Fix log output for incremental approaches.
Prefer purge_unreachable_states() over stats_reachable(). Do
not call scc_filter() on colored automata.
* spot/twaalgos/dtwasat.hh: Document the new "log" option.
* NEWS: Mention the changes.
* tests/python/satmin.ipynb: New file.
* tests/Makefile.am: Add it.
* doc/org/satmin.org, doc/org/tut.org: Link to it.
* doc/org/satmin.org, bin/man/spot-x.x: Adjust description
of CSV files.
* bench/dtgbasat/gen.py, bench/dtgbasat/tabl.pl,
bench/dtgbasat/tabl1.pl, bench/dtgbasat/tabl2.pl,
bench/dtgbasat/tabl3.pl, bench/dtgbasat/tabl4.pl: Adjust for
the new column.
* spot/misc/satsolver.cc, spot/misc/satsolver.hh (stats): Make it
const.
* python/spot/__init__.py (sat_minimize): Add display_log and
return_log options.
* tests/python/ipnbdoctest.py: Adjust to not compare SAT-minimization
logs as they contain timings.
* src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Record
statistics about intermediate automata if SPOT_SATLOG is set to some
filename, and display intermediate automata if SPOT_SATSHOW is set.
* bench/dtgbasat/stat.sh, bench/dtgbasat/stats.sh,
bench/dtgbasat/tabl.pl, bench/dtgbasat/tabl1.pl,
bench/dtgbasat/tabl2.pl, bench/dtgbasat/tabl3.pl,
bench/dtgbasat/tabl4.pl: Gather these extra statistics.
