tgba_explicit instances labelled by other objects than strings.

* src/tgba/tgbaexplicit.cc, src/tgba/tgbaexplicit.hh:
Split tgba_explicit in two levels: tgba_explicit with unlabelled
states, and tgba_explicit_labelled templated by the type of
the label.  Define tgba_explicit_string (with the interface
of the former tgba_explicit class) and tgba_explicit_formula
for future use in ltl2tgba.cc.
* src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh,
src/tgbaalgos/cutscc.cc, src/tgbaalgos/dupexp.cc,
src/tgbaalgos/emptiness.cc, src/tgbaalgos/ltl2tgba_fm.cc,
src/tgbaalgos/powerset.cc, src/tgbaalgos/randomgraph.cc,
src/tgbaparse/public.hh, src/tgbaparse/tgbaparse.yy,
src/tgbatest/explicit.cc, src/tgbatest/ltl2tgba.cc: Adjust to
use tgba_explicit_string when appropriate.

* m4/boost.m4: Rewrite like I already did in Vaucanson.

the test case might become too slow for the autobuilder.

* bench/ltlcounter/README, bench/ltlcounter/run,
bench/ltlcounter/plot.gnu, bench/ltlcounter/defs.in,
bench/ltlcounter/Makefile.am: New files.
* bench/Makefile.am (SUBDIRS): Add ltlcounter.
* configure.ac (AC_CONFIG_FILES): Adjust.
* THANKS: Add her.

* src/tgbatest/ltl2tgba.cc: Add option -T.

* src/ltlast/formula.cc, src/ltlast/formula.hh (formula::clone):
Transform this static function into a member function.
* src/ltlvisit/destroy.hh (destroy): Document and declare as
deprecated.
* bench/split-product/cutscc.cc, iface/gspn/ltlgspn.cc,
src/eltlparse/eltlparse.yy, src/eltltest/acc.cc,
src/evtgbaalgos/tgba2evtgba.cc, src/evtgbatest/ltl2evtgba.cc,
src/ltlast/automatop.cc, src/ltlast/binop.cc,
src/ltlast/multop.cc, src/ltlast/unop.cc, src/ltlenv/declenv.cc,
src/ltlenv/declenv.hh, src/ltlparse/ltlparse.yy,
src/ltltest/equals.cc, src/ltltest/randltl.cc,
src/ltltest/readltl.cc, src/ltltest/reduc.cc,
src/ltltest/syntimpl.cc, src/ltltest/tostring.cc,
src/ltlvisit/destroy.cc src/ltlvisit/basicreduce.cc,
src/ltlvisit/contain.cc, src/ltlvisit/reduce.cc,
src/ltlvisit/syntimpl.cc, src/tgba/bdddict.cc,
src/tgba/bddprint.cc, src/tgba/taa.cc,
src/tgba/tgbabddconcretefactory.cc, src/tgba/tgbaexplicit.cc,
src/tgba/tgbafromfile.cc, src/tgbaalgos/eltl2tgba_lacim.cc,
src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_fm.cc,
src/tgbaalgos/ltl2tgba_lacim.cc, src/tgbaalgos/neverclaim.cc,
src/tgbaalgos/randomgraph.cc, src/tgbaparse/tgbaparse.yy,
src/tgbatest/complementation.cc, src/tgbatest/eltl2tgba.cc,
src/tgbatest/ltl2tgba.cc, src/tgbatest/ltlprod.cc,
src/tgbatest/mixprod.cc, src/tgbatest/randtgba.cc,
src/tgbatest/reductgba.cc, wrap/python/cgi/ltl2tgba.in,
wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltlparse.py,
wrap/python/tests/ltlsimple.py: Adjust destroy() usage, and remove
the #include "destroy.hh" when appropriate.

* src/ltlvisit/clone.hh (clone): Document and declare as deprecated.
* src/ltlast/formula_tree.cc, src/ltlvisit/basicreduce.cc,
src/ltlvisit/clone.cc, src/ltlvisit/contain.cc,
src/ltlvisit/lunabbrev.cc, src/ltlvisit/reduce.cc,
src/ltlvisit/syntimpl.cc, src/tgba/bdddict.cc,
src/tgba/formula2bdd.cc, src/tgba/tgbabddconcretefactory.cc,
src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2tgba_fm.cc,
src/tgbatest/complementation.cc, wrap/python/tests/ltlsimple.py:
Adjust clone() usage, and remove the #include "clone.hh" when
appropriate.

* src/ltlast/formula.hh, src/ltlast/formula.cc (clone): Declare
as const.

and formula::destroy.

* src/ltlast/atomic_prop.cc, src/ltlast/automatop.cc,
src/ltlast/binop.cc, src/ltlast/formula.hh, src/ltlast/formula.cc,
src/ltlast/multop.cc, src/ltlast/unop.cc, src/ltlenv/declenv.cc,
src/ltlvisit/basicreduce.cc, src/ltlvisit/clone.cc,
src/ltlvisit/destroy.cc, src/ltlvisit/nenoform.cc,
src/ltlvisit/randomltl.cc, src/ltlvisit/reduce.cc,
src/tgbatest/randtgba.cc: Adjust.

Before this patch, every time you cloned a formula, the clone
visitor would recurse into the entire AST to increment the
reference count of all nodes.  When running ltl2tgba_fm on
the formula generated by "LTLcounterLinear.pl 8", approx 27% of
the time was spent in the clone visitor.

After this patch, cloning a formula is just an increment of the
reference count of the top node.  Children are decremented only
when the top node's ref count is decremented to zero.  With this
change, clone() and destroy() become constant time, the
ltl2tgba_fm spend only 0.01% of the time cloning formulae.

* src/ltlast/automatop.cc (~automatop): Decrement children.
(instance): Decrement children if the instance already exists.
* src/ltlast/binop.cc, src/ltlast/multop.cc, src/ltlast/unop.cc:
Likewise.
* src/ltlvisit/clone.cc (clone): Simplify, now we only need to
call ref().
* src/ltlvisit/destroy.cc (destroy): Simplify, now we only need
to call unref().
(destroy_visitor): Remove, no longer needed.

* src/ltlast/automatop.cc, src/ltlast/automatop.hh,
src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/multop.cc,
src/ltlast/multop.hh, src/ltlast/unop.cc, src/ltlast/unop.hh:
Add a dump_instance() static method to all class.
* src/ltltest/readltl.cc: Add option -r to dump all instances
with their reference count, after parsing and after deletion.

* src/ltlast/unop.hh (map): Use unop* as values.
* src/ltlast/binop.hh (map): Use binop* as values.
* src/ltlast/multop.hh (map): Use multop* as values.
* src/ltlast/automatop.hh (paircmp): Rename as tripletcmp.
(map): Use automaton* as values, not formula*.

* src/ltlast/automatop.hh, src/ltlast/automatop.cc: Add missing
instance_count() functions.
* src/tgbatests/eltl2tgba.cc: Add missing instance_count()
assertions at the end.
* src/tgbatests/ltl2tgba.cc: Also call automatop::instance_count(),
even if automatop are not used in ltl2tgba yet.  This way we won't
forget once eltl2tgba and ltl2tgba are merged.

in taa_succ_iterator and allow multiple initial states in taa.
* src/tgba/ltl2taa.cc: Remove temporary printing.

* src/tgbatest/defs.in (srcdir): Adjust from VPATH builds.
* src/tgbatest/ltlcounter.test (lcdir): Adjust definition to
new value of $srcdir.
(run): Fix setting of $run after $n = 2.  Using run=: would in
fact disable all the big tests...

formulae (i.e. n<=2) under valgrind.  The test case is too
slow otherwise.

* src/sanity/style.test: Make sure sh does not abort when read
exits with false.

* src/ltlast/formula.hh (formula_ptr_less_than::operator()):
Fix a typo where `l' was typed as `1'.
* src/tgbatest/ltlcounter/: New files from Kristin Y. Rozier.
* src/tgbatest/ltlcounter.test: New
* src/tgbatest/Makefile.am (TESTS): Add ltlcounter.test.
(EXTRA_DIST): Add files in ltlcounter/.

* src/tgbatest/ltl2tgba.cc (syntax): Add missing std::endl
before -taa.  Remove -r8 and -fr8, since they do not exist.

constructor.  It does the same thing as the default copy
constructor, and g++ 4.2.3 complained that the copy constructor
of spot::state was not called.  Reported by Denis Poitrenaud.

return 0 at the end to prevent g++ 4.2.3 from complaining about
a missing return.  Reported by Denis Poitrenaud.

* src/tgbaalgos/scc.cc (dump_scc_dot): Escape labels and other
strings output between quote in dot.
* src/tgbatest/kv.test: New file.
* src/tgbatest/Makefile.am (TESTS): Add it.

* src/tgba/taa.cc, src/tgba/taa.hh: taa_succ_iterator is not
on-the-fly anymore allowing some redundant transitions to be
removed. Also a new function to output a TAA.
* src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2taa.hh: Add the
refined rules from Tauriainen.
* src/tgbatest/ltl2tgba.cc: Use -c to activate refined rules in
ltl_to_taa.
* src/tgbatest/spotlbtt.test: More tests.

* src/tgba/taa.cc, src/tgbaalgos/ltl2taa.cc: Fix style.

* src/misc/bddop.hh, src/tgba/taa.hh, src/tgbaalgos/ltl2taa.hh:
Fix sanity (incorrect include guard).
* src/tgba/tgbacomplement.cc, src/tgba/tgbacomplement.hh:
Copyright 2009.
* src/tgbaalgos/eltl2tgba_lacim.cc: Use abbreviations.
* src/tgbatest/taa.cc: Fix it.

TGBA which uses TAA as an intermediate representation.  This is a
basic version, optimizations and enhancements will come later.

* src/tgbaalgos/ltl2taa.cc, src/tgbaalgos/ltl2taa.hh: The algortihm.
* src/tgbaalgos/Makefile.am: Adjust.
* src/tgbatest/ltl2tgba: New option: -taa, which uses this new
translation algorithm.
* src/tgbatest/spotlbtt.test: Add ltl2tgba -taa.

* misc/Makefile.am, misc/bbop.cc, misc/bddop.hh: Factorize some
code on BDDs to compute all_acceptance_conditions from
neg_acceptance_condition.
* src/tgba/Makefile.am, src/tgbatest/Makefile.am: Adjust.
* src/tgba/taa.cc, src/tgba/taa.hh: The TAA class.
* src/tgba/tgbaexplicit.hh: Use the factorized code in bddop.hh.
* src/tgbatest/taa.cc, src/tgbatest/taa.test: Some test cases.

the original automaton has no acceptance condition.

* src/tgba/tgbasgba.cc, src/tgba/tgbasgba.hh: New option:
when the original automaton has no accepting condition, it
explicitly considers that every state is accepting.

shared_ptr on states...
* src/tgba/state.hh: ... here.
* src/tgbatest/complementation.test: Do not apply some tests on
the new algorithm because it takes to much time to run.

* src/tgba/tgbacomplement.cc, src/tgba/tgbacomplement.hh: The
construction.
* src/tgbatest/Makefile.am: Adjust.
* src/tgbatest/complementation.cc: Add options to support this
construction in addition to Safra construction.
* src/tgba/Makefile.am: Adjust.
* src/tgbatest/complementation.test: Adjust to test also this
complementation.

src/tgbatest/dfs.test: Adjust headers to 80 columns.

* src/tgba/tgbasgba.hh, src/tgba/tgbasgba.hh: Here.
* src/tgbatest/ltl2tgba.cc: New option `-lS' for state-labeled
automata.
* src/tgba/Makefile.am: Adjust and sort files in tgba_HEADERS
and libtgba_la_SOURCES.

* src/tgba/tgbacomplement.cc, src/tgba/tgbacomplement.hh: Rename
as...
* src/tgba/tgbasafracomplement.cc,
src/tgba/tgbasafracomplement.hh: ... these, and adjust class name.
* src/tgba/Makefile.am, src/tgbatest/Makefile.am: Adjust.
* src/tgbatest/complementation.cc: Adjust.

* src/tgbaalgos/scc.cc (scc_map::update_supp_rec): Also take the
label of the outgoing edges into account.

* src/tgbaalgos/scc.hh (scc_map::scc::supp_rec): Initialize to
bddfalse, since this cannot occur in reallife.
* src/tgbaalgos/scc.cc (scc_map::update_supp_rec): Adjust.