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/Makefile.am

@@ -0,0 +1,49 @@
+## -*- coding: utf-8 -*-
+## Copyright (C) 2009, 2010, 2012, 2013, 2014, 2015 Laboratoire de Recherche
+## et Développement de l'Epita (LRDE).
+## Copyright (C) 2003, 2004 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/>.
+
+AUTOMAKE_OPTIONS = subdir-objects
+
+# List directories in the order they must be built.  Keep tests at the
+# end, after building '.' (since the current directory contains
+# libspot.la needed by the tests)
+SUBDIRS = misc priv tl graph twa twaalgos ta taalgos kripke	\
+          parseaut parsetl . bin tests sanity
+
+lib_LTLIBRARIES = libspot.la
+libspot_la_SOURCES =
+libspot_la_LDFLAGS = $(BUDDY_LDFLAGS) -no-undefined $(SYMBOLIC_LDFLAGS)
+libspot_la_LIBADD =  \
+  kripke/libkripke.la \
+  misc/libmisc.la \
+  parseaut/libparseaut.la \
+  parsetl/libparsetl.la \
+  priv/libpriv.la \
+  taalgos/libtaalgos.la \
+  ta/libta.la \
+  tl/libtl.la \
+  twaalgos/libtwaalgos.la \
+  twa/libtwa.la \
+  ../lib/libgnu.la
+
+# Dummy C++ source to cause C++ linking.
+nodist_EXTRA_libspot_la_SOURCES = _.cc
+_.cc:; touch $@