* wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltl2tgba.test:
New files.
* wrap/python/tests/Makefile.am (TESTS): Add ltl2tgba.test.
(EXTRA_DIST): Add ltl2tgba.py.
* wrap/python/tests/run.in: Distinguish *.py and *.test.

and wrap/python/tests/run.
* wrap/python/Makefile.am (SUBDIRS): New variable.
* wrap/python/spot.i: Include all formulae headers from ltlast/,
as well as ltlvisit/destroy.hh.
(spot::ltl::formula::__cmp__, spot::ltl::formula::__str__): New
functions.
* wrap/python/tests/Makefile.am, wrap/python/tests/ltlsimple.py,
wrap/python/tests/run.in: New files.

* wrap/python/Makefile.am, wrap/python/spot.i: ... here.
* wrap/Makefile.am: New file.
* configure.ac: Output wrap/python/Makefile.

equal visitor useless, since two equals formulae will now
share the same address.

* src/ltlast/multop.hh (add_sorted): New function.
(paircmp): New comparison functor.
(map): Use paircmp, we want to compare the vectors' contents,
not their addresses.
* src/ltlast/multop.cc (add_sorted): New function.
(add): Use it.
* src/ltltest/equals.cc, src/ltltest/tostring.cc: Compare
pointers instead of calling equal.
* src/ltlvisit/equals.cc, src/ltlvisit/equals.hh: Delete.
* src/ltlvisit/Makefile.am (libltlvisit_la_SOURCES): Remove
equals.cc and equals.hh.
* wrap/spot.i: Do not include equals.hh.

* Makefile.am (SUBDIRS): Add wrap.
* wrap/Makefile.am: New file.
* wrap/spot.i: New file.  Preliminary bindings for Python.
* configure.ac: Call adl_CHECK_PYTHON and output wrap/Makefile.