Introduce some experimental kripke classes to simplify writing

interfaces.

* src/kripke/Makefile.am, src/kripke/fairkripke.cc,
src/kripke/fairkripke.hh, src/kripke/kripke.cc,
src/kripke/kripke.hh: New files.
* src/Makefile.am: Recurse into kripke and link libkripke.la.
* configure.ac: Output src/kripke/Makefile.

src/kripke/Makefile.am

@@ -0,0 +1,32 @@
+## Copyright (C) 2009  Laboratoire de Recherche et Developpement de l'Epita
+##
+## 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 2 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 Spot; see the file COPYING.  If not, write to the Free
+## Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+## 02111-1307, USA.
+
+AM_CPPFLAGS = -I$(srcdir)/.. $(BUDDY_CPPFLAGS)
+AM_CXXFLAGS = $(WARNING_CXXFLAGS)
+
+kripkedir = $(pkgincludedir)/kripke
+
+kripke_HEADERS = \
+  fairkripke.hh \
+  kripke.hh
+
+noinst_LTLIBRARIES = libkripke.la
+libkripke_la_SOURCES = \
+  fairkripke.cc \
+  kripke.cc