Merge the core and python tests in the tests/ directory

* 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.

python/tests/parsetgba.py

@@ -1,43 +0,0 @@
-# -*- mode: python; coding: utf-8 -*-
-# Copyright (C) 2012, 2014, 2015 Laboratoire de Recherche et Développement
-# de l'Epita (LRDE).
-#
-# This file is part of Spot, a model checking library.
-#
-# Spot is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# Spot is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
-# License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import os
-import spot
-
-contents = '''
-HOA: v1 name: "a U b" States: 2 Start: 1 AP: 2 "a" "b" acc-name: Buchi
-Acceptance: 1 Inf(0) properties: trans-labels explicit-labels state-acc
-deterministic --BODY-- State: 0 {0} [t] 0 State: 1 [1] 0 [0&!1] 1 --END--
-'''
-
-filename = 'parsetgba.hoa'
-
-out = open(filename, 'w+')
-out.write(contents)
-out.close()
-
-a = spot.parse_aut(filename, spot.make_bdd_dict())
-
-assert not a.errors
-
-spot.print_dot(spot.get_cout(), a.aut)
-
-del a
-
-os.unlink(filename)