Add a new type of automata: State-labeled Alternating Büchi

Automata (SABA).

* src/saba/saba.hh, src/saba/saba.cc, src/saba/sabastate.hh,
src/saba/sabasucciter.hh: New.  Interface for
SABA (State-labeled Alternating Büchi Automata).
* src/saba/explicitstateconjunction.cc,
src/saba/explicitstateconjunction.hh: New.  Default
implementation for a conjunction of states.
* src/saba/Makefile.am: New.
* src/Makefile.am, configure.ac: Adjust.
* src/sabaalgos/sabareachiter.cc,
src/sabaalgos/sabareachiter.hh: New.  Iterate over all reachable
states of a spot::saba.
* src/sabaalgos/sabadotty.cc, src/sabaalgos/sabadotty.hh: New.
Print reachable states in dot format.
* src/sabaalgos/Makefile.am: New.

src/sabaalgos/Makefile.am

@@ -0,0 +1,30 @@
+## Copyright (C) 2009 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 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)
+
+sabaalgosdir = $(pkgincludedir)/sabaalgos
+
+sabaalgos_HEADERS = sabadotty.hh sabareachiter.hh
+
+noinst_LTLIBRARIES = libsabaalgos.la
+libsabaalgos_la_SOURCES = sabadotty.cc sabareachiter.cc