move the sanity tests in tests/sanity/

* spot/sanity/: Move ...
* tests/sanity/: ... here.
* spot/sanity/Makefile.am: Merge with...
* tests/Makefile.am: ... this.
* tests/run.in: Learn to run perl tests.
* README, configure.ac, spot/Makefile.am: Adjust.
* spot/tl/mark.hh: Add missing SPOT_API detected by
fixed private.test.

* spot/twaalgos/weight.cc, spot/twaalgos/weight.hh: Move...
* spot/priv/weight.cc, spot/priv/weight.hh: ... here, as
suggested by fixed private.test.
* spot/twaalgos/tau03opt.cc, spot/twaalgos/Makefile.am,
spot/priv/Makefile.am: Adjust.

tests/sanity/80columns.test

@@ -0,0 +1,69 @@
+#! /bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2012 Laboratoire de Recherche et Développement de
+# l'Epita (LRDE).
+# Copyright (C) 2004, 2005 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/>.
+
+# Check that all files use at most 80 columns.
+
+set -e
+
+rm -f failures
+
+LANG=en_US.UTF-8
+export LANG
+
+if [ "`echo '{r₁|r₂|r₃}' | wc -m`" != 11 ]; then
+  LANG=C
+  export LANG
+  # The current locale does not grok unicode.
+  # We still run this test, but only on lines that are purely ascii.
+  x='[^	-~]' # This blank is a tab.
+else
+  x='.'
+fi
+x="$x$x$x$x$x$x$x$x$x" # 9x
+x="$x$x$x$x$x$x$x$x$x" # 81x
+
+for dir in "${srcdir-.}/../../spot" "${srcdir-.}/.."; do
+
+  find "$dir" \(    -name "${1-*}.hh" \
+                 -o -name "${1-*}.hxx" \
+                 -o -name "${1-*}.cc" \
+                 -o -name "${1-*}.py" \
+		 -o -name "${1-*}.test" \) -a -type f -a -print |
+  while read file; do
+     if (expand $file | grep -q $x) 2>/dev/null; then
+	if grep 'GNU Bison' "$file" >/dev/null ||
+	   grep 'generated by flex' "$file" >/dev/null ; then
+	  :
+	else
+	  echo "$file" >>failures
+	fi
+     fi
+  done
+done
+
+if test -f failures; then
+   echo "The following files contain lines with more than 80 characters:"
+   cat failures
+   rm failures
+   exit 1;
+fi