* wrap/python/libpy.c: Delete.
* wrap/python/swigpy.i: New file.
* wrap/python/Makefile.am (swigpy_wrap.c): Build this from swigpy.i
and use it instead of libpy.c.
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.