* configure.ac: Output wrap/python/tests/Makefile

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/tests/run.in

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# If we are running from make check (srcdir is set), and VERBOSE is
+# unset, be quiet.
+test -n "$srcdir" && test -z "$VERBOSE" && exec >/dev/null 2>&1
+
+PYTHONPATH=..:@srcdir@/.. exec @PYTHON@ ${1+"$@"}