The ltl_to_tgba_fm() translation function was using a hash_map of
maps (ugh!) to merge transitions on output.  However recent libstd++
changed the implementation of hash_map (a.k.a. unordered_map) causing
transitions to be output in a different order.  This
implementation-dependent order caused the ltl2ta.test to fail because
the BA->TA transformation can produce TA of different sizes if you
simply change the order of transitions in the input BA! This does not
sound like a nice property for the BA->TA transformation, but Ala Eddine
isn't sure how to fix it yet.  In the meantime, this patch makes sure
ltl_to_tgba_fm() will return the same output regardless of the
implementation of hash_map.

The ltl2ta.test failure has been observed with g++ 4.9.2 on Arch Linux,
and with gcc-snapshot (5.0.0 20141016) on Debian.

* src/tgbaalgos/ltl2tgba_fm.cc: Rewrite the transition merging
using a std::vector and std::sort instead of nested maps tables.
* NEWS: Mention the fix.

* doc/org/init.el.in: Add compatibility with org 8.
* NEWS: Mention it.

We just changed the format specification today.

* src/tgbaalgos/hoaf.cc: Here.
* NEWS: mention it.

Reported by Joachim Klein.

* src/neverparse/neverclaimparse.yy: Store labels and the
location of their first definition in a global map to catch
redefinitions.
* src/tgbatest/neverclaimread.test: Test it.
* NEWS: Mention it.

* src/bin/ltlcross.cc: Fix it.
* src/tgbatest/ltl2dstar.test: Test it.
* NEWS: Mention it.

* src/bin/ltlcross.cc: Implement it.
* NEWS: Mention it.

* configure.ac, doc/org/tools.org, NEWS: Bump version to 1.2.5.

* src/tgbaalgos/ltl2tgba_fm.cc: Fix.
* src/tgbatest/randpsl.test: Rewrite using ltlcross and add a testcase.
* NEWS: Mention it.

Suggested by Joachim Klein.

* wrap/python/ajax/ltl2tgba.html: New option.
* wrap/python/ajax/protocol.txt, NEWS: Document it.
* wrap/python/ajax/spot.in: Implement it.
* wrap/python/spot.i: Export src/ltlvisit/lbt.hh.

Suggested by Joachim Klein.

* src/bin/ltlcross.cc: Implement it.
* src/tgbatest/ltlcross3.test: Test it.
* doc/org/ltlcross.org, NEWS: Document it.

Reported by Joachim Klein.

* src/bin/randltl.cc: Here.
* NEWS: Mention the fix.

Suggested by Joachim Klein.

* src/bin/randltl.cc: Implement it.
* src/ltltest/rand.test: Test it.
* doc/org/randltl.org, NEWS: Document it.

The specifications are at http://adl.github.io/hoaf/

* src/tgbaalgos/hoaf.cc, src/tgbaalgos/hoaf.hh: New files.
* src/tgbaalgos/Makefile.am: Add them.
* src/bin/dstar2tgba.cc, src/bin/ltl2tgba.cc,
src/tgbatest/ltl2tgba.cc: Add option to output HOA.
* NEWS: Mention it.

Suggested by Joachim Klein.

* wrap/python/ajax/spot.in: Try parse_lbt() when parse() fails.
* NEWS: Mention it.

So that people using white-background terminal can still read them...
Reported by Joachim Klein.

* src/bin/ltlcross.cc: Adjust.
* NEWS: Mention it.

The bug was reported by Joachim Klein.

* src/tgbaalgos/ltl2tgba_fm.cc (translate_dict::register_a_variable):
Reduce P(a M b) to P(a & b), not to P(a).
* src/tgbatest/ltlcross.test: Test Joachim's formula.
* src/tgbatest/ltl2ta.test: Adjust some expected values.
* NEWS: Mention the bug.

This was prompted by an exchange of emails with Caroline Lemieux.

* src/bin/man/ltl2tgba.x: Add notes and references.
* NEWS, THANKS: Update.

Reported by František Blahoudek.

* src/neverparse/neverclaimparse.yy: Fix.
* src/tgbatest/neverclaimread.test: Test it.
* NEWS: Mention the fix.

* NEWS, configure.ac, doc/org/tools.org: Bump version.

Fortunately was only enabled with the
ltl_simplifier_options::favor_event_univ option, which cannot yet be
turned on from the command-line tools.

* src/ltlvisit/simplify.cc, doc/tl/tl.tex: Remove the rule.
* src/ltltest/eventuniv.test: Adjust.
* NEWS: Mention the bug.

* src/tgbaalgos/ltl2tgba_fm.cc: Here.
* src/ltltest/reduccmp.test: Add a test case.
* NEWS: Mention it.

* src/ltlvisit/simplify.cc: Remove two incorrect rules, and
partially disable another one.
* doc/tl/tl.tex: Reflect the change.
* src/ltltest/reduccmp.test: Likewise.
* src/ltltest/equals.cc: Add safety checks to catch such errors in the
future.
* NEWS: Mention the bug.

* src/taalgos/tgba2ta.cc: Do not assume the input is an sba.
* src/tgbatest/ltl2ta2.test: New file.
* src/tgbatest/Makefile.am: Add it.
* NEWS: Mention the fix.

* NEWS, configure.ac, doc/org/tools.org: Update version.

* src/misc/satsolver.cc: Add the "-model" option.
* NEWS, doc/org/satmin.org, src/bin/man/spot-x.x: Mention it.

* doc/org/satmin.org, src/bin/man/spot-x.x: Document it.
* NEWS: Mention it.

* src/misc/timer.hh: Fix.
* NEWS: Mention the bug.

* src/tgbatest/ltlcross4.test: Work around Pandas 0.13.
* NEWS: Mention it.

* src/ltlvisit/length.cc (length_boolone_visitor): Simplify.
* NEWS: Mention Alexandre's fix.

* wrap/python/spot.i (spot::ltl::parse_error_list,
spot::tgba_parse_error_list): Add a __bool__ method, that is used
instead of __nonzero__ in Python 3.
* wrap/python/tests/interdep.py, wrap/python/tests/parsetgba.py:
Force destruction order.
* NEWS: Update.