* wrap/python/ajax/ltl2tgba.html: Adjust text.

* wrap/python/ajax/ltl2tgba.html: Update tooltips for LTL3BA.

* wrap/python/ajax/ltl2tgba.html: Here.

* wrap/python/ajax/css/loading.gif: New file.
* wrap/python/ajax/css/ltl2tgba.css (.loading): New class.
* wrap/python/ajax/ltl2tgba.html: Display loading.gif after 200ms if
the answer hasn't arrived
* wrap/python/ajax/spot.in: Do not suggest not to draw the automaton
on timeout.
* wrap/python/ajax/js/jquery.ba-dotimeout.min.js: New file.
* wrap/python/ajax/Makefile.am: Distribute it.

* wrap/python/ajax/ltl2tgba.html, wrap/python/ajax/protocol.txt:
Add options 'o' and 'p'.
* wrap/python/ajax/spot.in: Handle these, and use '-v' to check
version.

* wrap/python/ajax/ltl2tgba.html: Display the ltl3ba version, and
disable its tab when unavailable.
* wrap/python/ajax/protocol.txt: Add option for ltl3ba's version.
* wrap/python/ajax/spot.in: Implement this option, and catch
errors when ltl3ba is not installed.

* src/tgbaalgos/sccfilter.cc: tgba_explicit_numbered replace
tgba_explicit_string for the general case.  This way we don't have to
prefix the result of format_state() in case to states have the same
description.  We just number the states instead.  For the specific
cases where the input automata are instance of tgba_explicit_string or
tgba_explicit_formula, we clone the label.

* wrap/python/ajax/ltl2tgba.html: Add a dedicated tab with
two columns of options.
* wrap/python/ajax/css/ltl2tgba.css: Support for two columns.
* wrap/python/ajax/protocol.txt: Document new options.
* wrap/python/ajax/spot.in: Handle the new options.
* wrap/python/ajax/Makefile.am: Substitude LTL3BA in spot.in.

* src/tgba/tgbaexplicit.hh (state_is_accepting): Implement without
creating then deleting an iterator.

* src/tgbaalgos/degen.cc, src/tgbaalgos/degen.hh: New files, with
most of the logic extracted from src/tgba/tgbatba.cc (SBA version).
* src/tgbaalgos/Makefile.am: Distribute these.
* src/tgbatest/ltl2tgba.cc: Use the new degeneralization instead of
the on-the-fly version.

* src/ltlvisit/simplify.cc, src/tgba/tgbaproduct.cc,
src/tgba/tgbatba.cc, src/tgbaalgos/sccfilter.cc,
src/tgbaalgos/simulation.cc: Here.

* wrap/python/buddy.i (bdd_implies): New function.
* wrap/python/tests/implies.py: New file.
* wrap/python/tests/Makefile.am: Add it.

* src/bdd.h (bdd_implies): New function.
* src/bddop.c (bdd_implies): Implement it.
(CACHEID_IMPLIES, IMPLIES_HASH): New helper macros.

The unicity table was mixed with the bddNode table for now
apparent reason.  After the hash of some node is computed,
bddnodes[hash] did only contain some random node (not the one
looked for) whose .hash member would point to the actual node with
this hash.  So that's a two step lookup.  With this patch, we sill
have a two step lookup, but the .hash member have been moved to a
separate array.  A consequence is that bddNode is now 16-byte long
(instead of 20) so it will never span across two cache lines.

* src/kernel.h (bddNode): Remove the hash member, and move it...
(bddhash): ... as this new separate table.
* src/kernel.c, src/reorder.c: Adjust all code.

* wrap/python/tests/Makefile.am (TEST_ENVIRONMENT): Rename as...
(LOG_COMPILER): ... this.

* src/Config-parse.yy, src/Ltl-parse.yy, src/NeverClaim-parse.yy:
Rename these as..
* src/Config-parse.y, src/Ltl-parse.y, src/NeverClaim-parse.y:
... these.
* src/Config-parse_.cc, src/Ltl-parse_.cc,
src/NeverClaim-parse_.cc: New files to hack around
incompatibilities between Automake 1.12 and Automake 1.11.
* src/Makefile.am: Adjust.
* NEWS: Mention this change.

* examples/bddcalc/parser.yxx: Rename as ...
* examples/bddcalc/parser.y: ... this.
* examples/bddcalc/parser_.cxx: New file that includes parser.c.
* examples/bddcalc/Makefile.am: Adjust.
* examples/bddcalc/parser.hxx: Delete this unused file.

* src/eltlparse/Makefile.am, src/ltlvisit/randomltl.cc,
src/ltlvisit/simplify.cc, src/ltlvisit/snf.cc, src/ltlvisit/snf.hh:
Fix GPL to version 2 or later.

This helps reducing (p&XF!p)|(!p&XFp)|X(Fp&F!p) to (p&XF!p)|(!p&XFp).

* src/tgbaalgos/ltl2tgba_fm.cc: Adjust rewriting rules of X.
* src/tgbatest/ltl2tgba.test: Add a test case.

* src/tgba/wdbacomp.cc
(tgba_wdba_comp_proxy::compute_support_conditions): Fix.
* src/tgbatest/wdba2.test: Test a formula that used to be wrongly
minimized if translated by LaCIM, because the product of a
tgbabddconcrete automaton with another automaton (done during
WDBA-minimization) use the support conditions to speed things up.

* src/tgbaalgos/minimize.cc (minimize_obligation): Delete the powerset
automaton when we return 0 because we know if the result is correct
and don't have the formulae to check it.  Reported by Étienne Renault.

The previous implementation was fine to catch timeout of third-party
tools (like dot), but to good to catch timeout in Spot itself, because
Python will not deliver a SIGALRM while a native function (e.g. Spot's
translation) is running.  So we fork() the Python process, with a
parent that does nothing but wait for the termination of the child or
for an alarm.  On SIGALRM, the parent kills all children.

* wrap/python/ajax/spot.in: Adjust to fork.
* wrap/python/tests/alarm.py: New test file to test this
scenario in a more controled environment.
* wrap/python/tests/Makefile.am: Add it.

* configure.ac, NEWS: Bump version number.