Suggested by Akim.

* src/tgbaalgos/emptiness_stats.hh (unsigned_statistics_copy): New
class.

heuristic.

(tau03_opt_search): Add option "ordering" (off by default).
If enabled, initialize an explicit ordering for acceptance
conditions into the new member "cond" (a vector of bdds).
(project_acc): New helper function for projecting a set of
acceptance conditions to a subset that maximizes the number
of initial consecutive conditions covered by the set in the
condition ordering.
(dfs_blue): Implement the ordering heuristic.
(dfs_red): Use a sentinel in condition_stack to avoid explicit
checks for the stack's emptiness.
Consider also the conditions in acc when checking for the
completion of an accepting cycle.
Fix the implementation of condition heuristic.
Implement the ordering heuristic.
Simplify the removal of elements from condition_stack (due to
the way in which elements are pushed on the stack, there can
be at most one element with a given depth in the stack at any
one time).

Initialize tmp to suppress a GCC 4.0 warning.
* src/ltltest/randltl.cc (main): Likewise with another variable.

virtual destructors.
* src/tgba/tgbabddfactory.hh (tgba_bdd_factory): Likewise.
* src/misc/hash.hh: Use the std namespace only with GCC 3.0,
not with all compiler versions with minor version 0.
* src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator): Fix
friend declaration of ::spot::tgba_tba_proxy.

Conflicts:

	lbtt/INSTALL
	lbtt/doc/texinfo.tex
	lbtt/src/LbttAlloc.h

Finish merge

(parity_game_graph_delayed::get_relation): Disable for generalized
automata, it's wrong.

(parity_game_graph_delayed::nb_set_acc_cond): Simplify.

* tgba/tgbareduc.hh, tgbaalgos/reductgba_sim.cc,
tgbaalgos/reductgba_sim.hh, tgbaalgos/reductgba_sim_del.cc: Fix them.

* src/misc/hash.hh (ptr_hash): Use knuth32_hash.
* src/tgba/tgbabddconcretefactory.hh (tgba_bdd_concrete_factory): Use
ltl::formula_ptr_hash for acc_map_.

the reduce_ltl argument.
* src/tgbatest/ltl2tgba.cc: Add options -fr1, -fr2, -fr3, and -fr4.
* src/tgbatest/spotlbtt.test, bench/ltl2tgba/algorithms: Test -fr4.
* bench/ltl2tgba/parseout.pl: Suppress Perl warnings on disabled
algorithms.

* bench/Makefile.am (SUBDIRS): Add ltl2tgba.
* README: Mention bench/ltl2tgba.

bench/ltl2tgba/algorithms, bench/ltl2tgba/big,
bench/ltl2tgba/defs.in, bench/ltl2tgba/formulae.ltl,
bench/ltl2tgba/known, bench/ltl2tgba/parseout.pl,
bench/ltl2tgba/small: New files.
* src/tgbatest/ltl2baw.pl: Move ...
* bench/ltl2tgba/ltl2baw.in: ... here.
* src/tgbatest/Makefile.am: Adjust.
* configure.ac: Adjust.

before the degeneralized automaton.

http://spot.lip6.fr/wiki/EmptinessCheckOptions for the syntax.

an undeclared acceptance condition.
* src/tgbaalgos/save.cc (print_acc): Unquote atomic propositions.

* bench/emptchk/pml2tgba.pl: Add option -r.
* bench/emptchk/pml-clserv.sh, bench/emptchk/pml-eeaean.sh:
Also run on reduced graphs (this is fast).
* bench/emptchk/README: Adjust.

postfix_visitor.

and "redweights" (on by default).

account for the size of condition_stack.

* bench/emptchk/ltl-human.sh, bench/emptchk/ltl-random.sh,
src/sanity/style.test, src/tgba/bdddict.cc,
src/tgba/succiterconcrete.hh, src/tgba/tgbabddcoredata.hh,
src/tgba/tgbareduc.cc, src/tgba/tgbareduc.hh,
src/tgbaalgos/gv04.cc, src/tgbaalgos/gv04.hh,
src/tgbaalgos/magic.cc, src/tgbaalgos/magic.hh,
src/tgbaalgos/se05.cc, src/tgbaalgos/se05.hh,
src/tgbaalgos/tau03.cc, src/tgbaalgos/tau03.hh,
src/tgbaalgos/tau03opt.cc, src/tgbaalgos/tau03opt.hh,
src/tgbatest/dfs.test: Replace them by "acceptance condition".

misc/optionmap.hh.