* spot/gen/automata.cc, spot/gen/automata.hh, bin/genaut.cc: Rename
the enum, function, and command-line option.
* tests/core/genaut.test, tests/python/gen.ipynb, tests/python/gen.py:
Adjust test cases.
* doc/org/genaut.org: Adjust doc.

This addresses part of #35, and is just a generalization of the rules
from 646c5170 for #263 (hence, no new documentation).

* spot/tl/simplify.cc: Implement this.
* tests/core/reduccmp.test: Add test cases.
* tests/core/stutter-tgba.test: Adjust to expect smaller automata.

Fixes #108.

* spot/tl/simplify.cc: Implement the reduction.
* doc/tl/tl.tex, NEWS: Document it.
* tests/core/reduccmp.test: Test it.

Fixes #277.

* spot/twaalgos/ltl2tgba_fm.cc: Improve the translation of f U g
when f is universal.  Suggested by Maximilien Colange.
* tests/core/ltl2tgba.test: Test it.

As suggested in #263.

* spot/gen/formulas.cc, spot/gen/formulas.hh, bin/genltl.cc: Implement
these options.
* tests/core/genltl.test: Use them.
* NEWS: Mention them.

For #263, reported by Mikuláš Klokočka.

G(a & Xe1 & F(b & e2)) = G(a & e1 & Fb & e2)
F(a | Xu1 | G(b | u2)) = F(a | u1 | Gb | u2)

* spot/tl/simplify.cc: Implement the rules.
* doc/tl/tl.tex, NEWS: Document them.
* tests/core/reduccmp.test, tests/core/eventuniv.test: Add test cases.
* tests/core/det.test, tests/core/ltl2tgba2.test: Adjust to expect
smaller automata.
* THANKS: Add Mikuláš.

* spot/priv/enumflags.hh: Delete.
* spot/priv/Makefile.am, debian/copyright: Adjust.
* spot/twaalgos/remfin.cc: Replace the complex enum
definition by a plain enum that is almost not used.

* spot/twaalgos/remfin.cc (remove_fin_impl): Apply the Rabin strategy
before the Streett one.

The generalization to Streett-like of 7b5b8f34 was incomplete for this
case.  Thanks to František Blahoudek for reporting the bug.
Fixes #279.

* spot/twaalgos/totgba.cc (streett_to_generalized_buchi): Here.
* tests/core/remfin.test: Add more tests.

This is probably an environment variable definition.

* bin/common_trans.cc: Here.  A use-case appears in the test of the
next patch.

* spot/twa/acc.cc, spot/twa/acc.hh: Add a LaTeX output for acceptance
conditions.
* spot/twaalgos/dot.cc: Implement the 'x' option and refactor the code
a bit to limit duplication.
* tests/core/dot2tex.test: New test case (requires dot2tex).
* tests/Makefile.am: Add dot2tex.test.
* tests/core/alternating.test, tests/core/readsave.test,
tests/python/automata-io.ipynb: Adjust expected output.
* NEWS, doc/org/oaut.org: Mention the new option.

This way in 2.5 we can make 'a' the default, and tell people to use
SPOT_DOTDEFAULT=A if they want the old behavior in both 2.4 and 2.5.

* spot/twaalgos/dot.cc: Implement the option.
* NEWS, bin/common_aoutput.cc: Mention it.
* tests/core/readsave.test: Test it.

* spot/twaalgos/dot.cc (print_acceptance_for_human): Add Rabin-like
and Streett-like checks.
* tests/core/sccdot.test, tests/python/decompose.ipynb,
tests/python/randaut.ipynb, tests/core/alternating.test: Adjust.

* doc/org/csv.org: Mention that %h must be double-quoted in CSV output.

* tests/python/dualize.py: test that an automaton and its dual have
  complementary languages.

spot.complete() could complete an empty co-Büchi automaton into an
automaton accepting everything.

* NEWS: Document it
* spot/twaalgos/complete.cc: Fix it
* tests/core/complete.test, tests/core/prodor.test: Test it

* NEWS, doc/org/concepts.org, doc/org/hierarchy.org,
  spot/misc/optionmap.hh, spot/twa/acc.hh, spot/twaalgos/ltl2tgba_fm.hh,
  spot/twaalgos/sccinfo.hh, spot/twaalgos/translate.cc: fix typos

* configure.ac: Compile in C++14 by default and rename
--enable-c++14 as c++17.
* doc/org/compile.org, doc/org/concepts.org, doc/org/index.org,
doc/org/install.org, doc/org/tut.org, doc/org/upgrade2.org, HACKING,
NEWS, README: Adjust all mentions of C++11.
* spot/twaalgos/stats.hh: Use std::make_unique.

* configure.ac: Here.  Rename --enable-c++14 into --enable-c++17.

* doc/org/arch.tex: Add autcross.
* tests/sanity/bin.test: Make sure all binaries appear in arch.tex.

* spot/twaalgos/dot.cc: Display common acceptance names.
* NEWS: Mention the change.
* doc/org/oaut.org: Adjust text.
* tests/core/alternating.test, tests/core/readsave.test,
tests/python/_altscc.ipynb, tests/python/alternation.ipynb,
tests/python/atva16-fig2a.ipynb, tests/python/atva16-fig2b.ipynb,
tests/python/automata.ipynb, tests/python/decompose.ipynb,
tests/python/gen.ipynb, tests/python/highlighting.ipynb,
tests/python/product.ipynb, tests/python/randaut.ipynb: Adjust test
cases.

Bug introduced in abe2c08b, visible in tests/python/product.ipynb,
and tests/python/acc_cond.ipynb.

* spot/twa/acc.hh: fix operator| and operator&.
* tests/python/acc_cond.ipynb: Adjust test case.

* spot/tl/hierarchy.cc (is_recurrence): Do not request state-based
acceptance, now that the Rabin->DBA conversionn works on
transition-based acceptance as well.

* doc/org/hierarchy.org: Update with small typos, and
notes about tra2tba.

* spot/twaalgos/remfin.cc (tra_to_tba, is_scc_tba_type): Here.

Fixes #278. Also adds a test ensuring non-regression.

* spot/twaalgos/toweak.cc: Fixes the bug.
* tests/python/toweak.py: Add a test case.

* spot/twaalgos/remfin.cc: If no Inf set is used, set sbacc early so
that it is used in the algorithm.
* tests/core/remfin.test: Add more tests.
* NEWS: Mention the bug.

* NEWS, spot/twaalgos/dualize.cc, spot/twaalgos/dualize.hh,
  spot/twaalgos/langmap.cc, spot/twaalgos/sum.hh,
  tests/python/streett_totgba.py: Fixes typo.

* tools/snippet/_Noreturn.h, tools/snippet/c++defs.h,
tools/snippet/arg-nonnull.h, tools/snippet/warn-on-use.h: Rename to...
* lib/_Noreturn.h, lib/c++defs.h, lib/arg-nonnull.h,
lib/warn-on-use.h: ... these.
* lib/filename.h, lib/getopt-cdefs.in.h, lib/getopt-core.h,
lib/getopt-ext.h, lib/getopt-pfx-core.h, lib/getopt-pfx-ext.h,
lib/localtime-buffer.c, lib/localtime-buffer.h, lib/malloca.c,
lib/malloca.h, lib/malloca.valgrind, lib/stat-w32.c, lib/stat-w32.h,
m4/eealloc.m4, m4/localtime-buffer.m4, m4/malloca.m4: New files.
* lib/argp-help.c, lib/argp-parse.c, lib/error.c, lib/float.in.h,
lib/getopt1.c, lib/getopt.c, lib/getopt.in.h, lib/getopt_int.h,
lib/gettext.h, lib/gettimeofday.c, lib/intprops.h, lib/isatty.c,
lib/limits.in.h, lib/localcharset.c, lib/Makefile.am, lib/mbrtowc.c,
lib/mbsinit.c, lib/msvc-nothrow.c, lib/quotearg.c, lib/stat.c,
lib/stdalign.in.h, lib/stdint.in.h, lib/string.in.h,
lib/sys_stat.in.h, lib/sys_types.in.h, lib/tempname.c, lib/time.in.h,
lib/unistd.in.h, lib/vasnprintf.c, lib/wchar.in.h, lib/wctype.in.h,
lib/xalloc.h, lib/xalloc-oversized.h, m4/fcntl-o.m4, m4/float_h.m4,
m4/getopt.m4, m4/gettimeofday.m4, m4/gnulib-common.m4,
m4/gnulib-comp.m4, m4/include_next.m4, m4/largefile.m4, m4/lstat.m4,
m4/mbrtowc.m4, m4/memchr.m4, m4/mkstemp.m4, m4/printf.m4, m4/sleep.m4,
m4/stat.m4, m4/stdalign.m4, m4/stdint.m4, m4/strerror.m4,
m4/string_h.m4, m4/sys_stat_h.m4, m4/sys_time_h.m4, m4/sys_types_h.m4,
m4/time_h.m4, m4/unistd_h.m4, m4/wchar_h.m4, m4/wctype_h.m4,
m4/wint_t.m4: Update.

* NEWS: Fix them.

* spot/twaalgos/alternation.cc: Here.

* bin/common_aoutput.cc, NEWS: Update documentation.
* spot/twaalgos/stats.cc: Honor c and C.
* tests/core/alternating.test: Test it.

* spot/twaalgos/isweakscc.cc, spot/twaalgos/isweakscc.hh,
spot/twaalgos/mask.cc, spot/twaalgos/mask.hh: Adjust to
work with alternating automata.
* spot/twaalgos/sccinfo.cc, spot/twaalgos/sccinfo.hh
(determine_unknown_acceptance): Do not complain about
not supporting alternating automata if there is not
indeterminate acceptance.
* spot/twaalgos/stats.cc: Fix a bug were %[iw]c was
read as %[iww]c.
* tests/core/alternating.test: Test is_inherently_weak_scc() and
is_weak_scc().
* python/spot/impl.i: Add missing python bindings
for isweakscc.hh.

Let's close #212 even if this does not cover the 32 sets.

* spot/twaalgos/dot.cc: Change the palette.
* doc/org/autfilt.org, NEWS: Adjust documentation.
* tests/core/alternating.test, tests/core/readsave.test,
tests/core/tgbagraph.test, tests/python/_altscc.ipynb,
tests/python/alternation.ipynb, tests/python/atva16-fig2a.ipynb,
tests/python/automata-io.ipynb, tests/python/automata.ipynb,
tests/python/decompose.ipynb, tests/python/gen.ipynb,
tests/python/highlighting.ipynb, tests/python/ltsmin-dve.ipynb,
tests/python/piperead.ipynb, tests/python/product.ipynb,
tests/python/randaut.ipynb, tests/python/word.ipynb: Adjust
test cases.

* doc/org/g++wrap.in: Honor CPPFLAGS.

* spot/tl/formula.hh: Move all throw statements behind
some [[noreturn]] report...() methods...
* spot/tl/formula.cc: ... defined here.  This makes the methods
shorter and helps their inlining.  Incidentally, this also removes the
uninitialized read that weirdly occurs when _GLIBCXX_DEBUG is on, as
observed with #184, but I do not know why.

* spot/twaalgos/isunamb.cc: Actually set the size of the vector
instead of just reserving the size.

* spot/parseaut/parseaut.yy: Check the SPOT_HOA_TOLERANT variable.
* tests/core/ltl3ba.test, tests/core/parseaut.test: Adjust test cases.
* NEWS, bin/man/spot-x.x: Mention SPOT_HOA_TOLERANT.