* src/ltlenv/environment.hh, src/ltlvisit/basicreduce.cc: Remove
useless FIXMEs.
* src/ltlvisit/reduce.cc (reduce_visitor::visit(binop)): Compute
syntactic implications only when needed.
* src/tgbaalgos/reductgba_sim_del.cc
(build_recurse_successor_spoiler): Remplace the FIXME by an assert.
* src/tgba/tgbareduc.cc: Reword some comments, discard old
commented code.

so we tolerate more flex versions.
* src/ltlparse/Makefile.am (AM_CXXFLAGS): Likewise.
* src/tgbaparse/Makefile.am (AM_CXXFLAGS): Likewise.

using 80 columns.

* src/ltlast/formula.hh (hash): Remove const from return type.
This kills a g++-4.3 warning.
* src/misc/hash.hh: Adjust to use unordered_set and unordered_map
from TR1 when g++-4.3 is used.
* src/evtgba/product.cc, src/ltltest/randltl.cc,
src/ltlvisit/randomltl.cc, src/ltlvisit/tostring.cc,
src/misc/freelist.hh, src/misc/optionmap.cc,
src/tgba/tgbareduc.hh, src/tgbaalgos/gv04.cc,
src/tgbaalgos/ltl2tgba_fm.cc, src/tgbaalgos/randomgraph.cc,
src/tgbatest/ltl2tgba.cc, src/tgbatest/randtgba.cc,
src/ltltest/equals.cc, src/ltltest/readltl.cc,
src/ltltest/reduc.cc, src/ltltest/syntimpl.cc,
src/ltltest/tostring.cc, src/tgbatest/ltlprod.cc,
src/tgbatest/powerset.cc, src/tgbatest/explprod.cc,
src/tgbatest/mixprod.cc, src/tgbatest/readsave.cc,
src/tgbatest/reductgba.cc, src/tgbatest/tgbaread.cc,
src/tgbatest/tripprod.cc, src/evtgbatest/product.cc,
src/evtgbatest/readsave.cc, src/evtgbatest/ltl2evtgba.cc,
src/evtgbatest/readsave.cc: Add missing includes.
* src/tgbatest/explicit.test, src/tgbatest/explprod.test,
src/tgbatest/explpro2.test, src/tgbatest/troprod.test,
src/tgbatest/emptchk.test: Cope with different outputs.

compile with g++-4.3 otherwise.
* src/Ltl-parse.yy (matchCharactersFromStream): Declare the chars
as const to kill a g++ warning.
* src/NeverClaim-parse.yy (yyerror): Declare the error
message as const to kill a g++ warning.

until Doxygen is fixed.  Doxygen 1.5.5 generate incorrect LaTeX
code.

Clarify comments.

Remove superfluous semicolon.

assert().  This patch has been lying in my tree since 2007-04-30.

intricate memory corruption bug prevented me to check the patch
in.  It took me two days to realize why find_state() must do a
double loop over the candidates to check for equality before
checking for inclusion(s).

* iface/gspn/ltlgspn.cc: New options, -e45 and -n.
* iface/gspn/ssp.cc, iface/gspn/ssp.hh: Handle these.
* src/tgbaalgos/gtec/gtec.cc (TRACE): Add some debugging traces.
(couvreur99_check_shy::dump_queue): New function.
* src/tgbaalgos/gtec/gtec.hh (couvreur99_check_shy::dump_queue):
New function.

Debian versions installed in build hosts during automatic builds.

* m4/libtool.m4: New file, from GNU Libtool 1.4.24.
* tools/ltmain.sh: New file, from GNU Libtool 1.4.24.
* HACKING: Installing Libtool is no longer required.

* configure.ac: Use it.

Disable the default GC handler.  Reported by
Kristin Yvonne Rozier <kyrozier@cs.rice.edu>.

stderr, not stdout.  Reported by Kristin Yvonne Rozier
<kyrozier@cs.rice.edu>.

events.

* iface/gspn/ssp.cc, iface/gspn/ssp.hh (gspn_ssp_interface)
support for a new option "pushfront".

* HACKING, INSTALL, doc/Doxyfile.in, lbtt/INSTALL: Update to newer
tools.

Fix the declaration for GCC 4.1.2.
* iface/gspn/gspn.cc (tgba_gspn_private_::~tgba_gspn_private_):
Likewise.

Add support for -r8/-fr8.

long as the formula changes, it makes more sense when
combining algorithm.  E.g. basic reductions can help language
containment and vice-versa.