rename src/ as spot/ and use include <spot/...>

* NEWS: Mention the change.
* src/: Rename as ...
* spot/: ... this, adjust all headers to include <spot/...> instead of
"...", and adjust all Makefile.am to search headers from the top-level
directory.
* HACKING: Add conventions about #include.
* spot/sanity/style.test: Add a few more grep to catch cases
that do not follow these conventions.
* .gitignore, Makefile.am, README, bench/stutter/Makefile.am,
bench/stutter/stutter_invariance_formulas.cc,
bench/stutter/stutter_invariance_randomgraph.cc, configure.ac,
debian/rules, doc/Doxyfile.in, doc/Makefile.am,
doc/org/.dir-locals.el.in, doc/org/g++wrap.in, doc/org/init.el.in,
doc/org/tut01.org, doc/org/tut02.org, doc/org/tut03.org,
doc/org/tut10.org, doc/org/tut20.org, doc/org/tut21.org,
doc/org/tut22.org, doc/org/tut30.org, iface/ltsmin/Makefile.am,
iface/ltsmin/kripke.test, iface/ltsmin/ltsmin.cc,
iface/ltsmin/ltsmin.hh, iface/ltsmin/modelcheck.cc,
wrap/python/Makefile.am, wrap/python/ajax/spotcgi.in,
wrap/python/spot_impl.i, wrap/python/tests/ltl2tgba.py,
wrap/python/tests/randgen.py, wrap/python/tests/run.in: Adjust.

spot/twaalgos/stutter.hh

@@ -0,0 +1,69 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 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/>.
+
+#pragma once
+
+#include <spot/twa/twagraph.hh>
+
+namespace spot
+{
+  SPOT_API twa_graph_ptr
+  sl(const twa_graph_ptr&);
+
+  SPOT_API twa_graph_ptr
+  sl(const const_twa_graph_ptr&, bdd);
+
+  SPOT_API twa_graph_ptr
+  sl2(const twa_graph_ptr&);
+
+  SPOT_API twa_graph_ptr
+  sl2(const const_twa_graph_ptr&, bdd);
+
+#ifndef SWIG
+  SPOT_API twa_graph_ptr
+  sl2(twa_graph_ptr&&, bdd = bddfalse);
+#endif
+
+  SPOT_API twa_graph_ptr
+  closure(const const_twa_graph_ptr&);
+
+#ifndef SWIG
+  SPOT_API twa_graph_ptr
+  closure(twa_graph_ptr&&);
+#endif
+
+  /// \ingroup ltl_misc
+  /// \brief Check if a formula has the stutter invariance property.
+  SPOT_API bool
+  is_stutter_invariant(formula f);
+
+  SPOT_API bool
+  is_stutter_invariant(twa_graph_ptr&& aut_f,
+		       twa_graph_ptr&& aut_nf, bdd aps,
+		       int algo = 0);
+
+  /// \brief Check whether \a aut is stutter-invariant
+  ///
+  /// This procedure only works if \a aut is deterministic, or if the
+  /// equivalent formula \a f is given.  The stutter-invariant property
+  /// of the automaton is updated and also returned.
+  SPOT_API bool
+  check_stutter_invariance(const twa_graph_ptr& aut,
+			   formula f = nullptr);
+}