move spot/bin/ and spot/tests/ up by one level

* spot/bin/: Move...
* bin/: ... here.
* spot/tests/: Move...
* tests/: ... here.
* Makefile.am, README, bench/stutter/Makefile.am,
bench/stutter/stutter_invariance_formulas.cc, doc/Makefile.am,
configure.ac, debian/rules, spot/Makefile.am, spot/ltsmin/Makefile.am,
spot/ltsmin/kripke.test, spot/sanity/style.test, python/tests/run.in:
Adjust.

tests/tostring.cc

@@ -0,0 +1,76 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 2008, 2009, 2012, 2015 Laboratoire de Recherche et
+// Développement de l'Epita (LRDE).
+// Copyright (C) 2003 Laboratoire d'Informatique de Paris 6 (LIP6),
+// département Systèmes Répartis Coopératifs (SRC), Université Pierre
+// et Marie Curie.
+//
+// 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/>.
+
+#include <iostream>
+#include <cassert>
+#include <cstdlib>
+#include <spot/tl/parse.hh>
+#include <spot/tl/print.hh>
+
+static void
+syntax(char *prog)
+{
+  std::cerr << prog << " formula1" << std::endl;
+  exit(2);
+}
+
+int
+main(int argc, char **argv)
+{
+  if (argc != 2)
+    syntax(argv[0]);
+
+  {
+    spot::parse_error_list p1;
+    auto f1 = spot::parse_infix_psl(argv[1], p1);
+
+    if (spot::format_parse_errors(std::cerr, argv[1], p1))
+      return 2;
+
+    // The string generated from an abstract tree should be parsable
+    // again.
+
+    std::string f1s = spot::str_psl(f1);
+    std::cout << f1s << '\n';
+
+    auto f2 = spot::parse_infix_psl(f1s, p1);
+
+    if (spot::format_parse_errors(std::cerr, f1s, p1))
+      return 2;
+
+    // This second abstract tree should be equal to the first.
+
+    if (f1 != f2)
+      return 1;
+
+    // It should also map to the same string.
+
+    std::string f2s = spot::str_psl(f2);
+    std::cout << f2s << '\n';
+
+    if (f2s != f1s)
+      return 1;
+  }
+
+  assert(spot::fnode::instances_check());
+  return 0;
+}