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.

bin/common_file.cc

@@ -0,0 +1,43 @@
+// -*- coding: utf-8 -*-
+// Copyright (C) 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/>.
+
+#include "common_file.hh"
+#include <error.h>
+#include <iostream>
+
+
+output_file::output_file(const char* name)
+{
+  std::ios_base::openmode mode = std::ios_base::trunc;
+  if (name[0] == '>' && name[1] == '>')
+    {
+      mode = std::ios_base::app;
+      append_ = true;
+      name += 2;
+    }
+  if (name[0] == '-' && name[1] == 0)
+    {
+      os_ = &std::cout;
+      return;
+    }
+  of_ = new std::ofstream(name, mode);
+  if (!*of_)
+    error(2, errno, "cannot open '%s'", name);
+  os_ = of_;
+}