* python/spot/__init__.py: Handle 'dicho' option in 'sat_minimize'.
* spot/priv/satcommon.cc: Implement get_number_of_distinct_vals.
* spot/priv/satcommon.hh: Declare get_number_of_distinct_vals.
* spot/twaalgos/dtbasat.cc: Use get_number_of_distinct_vals.
* spot/twaalgos/dtbasat.hh: Change dichotomy function's prototype.
* spot/twaalgos/dtwasat.cc: Use get_number_of_distinct_vals.
* spot/twaalgos/dtwasat.hh: Change dichotomy function's prototype.
Handle options.
* spot/twaalgos/postproc.cc: Handle options.
* spot/twaalgos/postproc.hh: Add dicho_langmap_ var for options.
* tests/core/satmin2.test: Add tests for dichotomy.
* tests/core/satmin.test: Add tests for dichotomy.
* tests/python/satmin.py: Replace 'dichotomy' with 'dicho' option.

* python/spot/__init__.py: Add 'assume' option.
* spot/misc/satsolver.cc: Add function to handle assumptions.
* spot/misc/satsolver.hh: Declare assumption function.
* spot/twaalgos/dtbasat.cc: Implement dtba_sat_minimize_assume.
* spot/twaalgos/dtbasat.hh: Declare it.
* spot/twaalgos/dtwasat.cc: Implement dtwa_sat_minimize_assume and
handle options.
* spot/twaalgos/dtwasat.hh: Declare it.
* spot/twaalgos/postproc.cc: Handle options.
* spot/twaalgos/postproc.hh: Use param_ var for incr and assume.
* tests/core/satmin.test: Add tests for the new function.
* tests/core/satmin2.test: Add tests for the new function.
* tests/python/satmin.py: Add tests for the new function.

* python/spot/__init__.py: Add 'incr' boolean argument.
* spot/twaalgos/dtbasat.cc: Implement dtba_sat_minimize_incr(...).
* spot/twaalgos/dtbasat.hh: Declare it.
* spot/twaalgos/dtwasat.cc: Implement dtwa_sat_minimize_incr(...) and
deal with options.
* spot/twaalgos/dtwasat.hh: Declare it.
* spot/twaalgos/postproc.cc: Add option --sat-minimize=incr.
* spot/twaalgos/postproc.hh: Add incr parameter.
* tests/core/satmin.test: Add tests for incremental version.
Update expected result.
* tests/core/satmin2.test: Add tests for incremental version.
* tests/python/satmin.py: Add tests for incremental version.

* tests/core/satmin.test: Delete check for SPOT_SATSOLVER env
variable and add state numbers verification.
* tests/core/satmin2.test: Delete check for SPOT_SATSOLVER
env variable.
* tests/python/satmin.py: Delete check for SPOT_SATSOLVER
env variable.

* tests/: Rename as...
* tests/core/: ... this.
* python/tests/: Rename as...
* tests/python/: ... this.
* python/tests/run.in: Move as...
* tests/run.in: This, and adjust.
* tests/Makefile.am: Adjust to run both core and python tests.
* configure.ac, README, debian/python3-spot.examples, debian/rules,
doc/org/tut.org, python/Makefile.am, spot/ltsmin/Makefile.am,
spot/ltsmin/kripke.test, spot/sanity/ipynb.test: Adjust.

* wrap/python/: Rename to...
* python/: ... this.
* wrap/: Delete.
* Makefile.am, README, configure.ac, debian/python3-spot.examples,
debian/rules, doc/org/.dir-locals.el.in, doc/org/init.el.in,
spot/sanity/ipynb.test: Adjust.

* NEWS: Mention it.
* wrap/python/spot.py: Rewrite the sat_minimize() function.
* wrap/python/tests/satmin.py: New file.
* wrap/python/tests/Makefile.am (TESTS): Add it.