rename iface/ as spot-if/

So that instead of having to do
  #incluce <spot/iface/ltsmin/ltsmin.hh>
for using installed the installed header, and
  #incluce <iface/ltsmin/ltsmin.hh>
for using the non-installed version, we now do
  #incluce <spot-if/ltsmin/ltsmin.hh>
in both cases.

* iface/: Rename as...
* spot-if/: ... this.
* doc/Doxyfile.in, README, configure.ac, Makefile.am,
spot/sanity/80columns.test, spot/sanity/style.test: Adjust.
* NEWS: Mention the change.
* spot-if/ltsmin/Makefile.am: Install headers in $includedir/spot-if.
* debian/libspot-dev.install: Distribute that directory as well.

spot-if/ltsmin/kripke.test

@@ -0,0 +1,42 @@
+#! /bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2011, 2014, 2015 Laboratoire de Recherche et Developpement
+# 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/>.
+
+
+
+. ./defs
+
+divine compile > output 2>&1
+
+if grep -i 'ltsmin ' output; then
+  :
+else
+  echo "divine not installed, or no ltsmin interface"
+  exit 77
+fi
+
+set -e
+
+run 0 ../modelcheck -gK ${srcdir}/finite.dve 'F("P.a > 5")' > output
+run 0 ${top_builddir}/spot/tests/parse_print output | tr -d '"' > output2
+tr -d '"' < output >outputF
+cmp outputF output2
+
+../modelcheck -gK $srcdir/beem-peterson.4.dve '!G("pos[1] < 3")' > outputP
+${top_builddir}/spot/tests/ikwiad -e -KPoutputP '!G("pos[1] < 3")'