* 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.

Fixes #212.

* spot/parseaut/parseaut.yy, spot/twaalgos/hoa.cc: Recognize
exist-branch, and adjust printer to the 1.1 semantics.
* tests/core/alternating.test, tests/core/complete.test,
tests/core/det.test, tests/core/explsum.test,
tests/core/parseaut.test, tests/core/readsave.test,
tests/core/sbacc.test, tests/core/tgbagraph.test,
tests/python/alternating.py, tests/python/dualize.py: Adjust test
cases.
* NEWS: Mention the change.

Fixes #252.

* NEWS: Mention it.
* bin/autcross.cc, bin/man/autcross.x, doc/org/autcross.org: New
files.
* bin/Makefile.am, bin/man/Makefile.am, doc/org/tools.org,
doc/Makefile.am: Add them.
* bin/autfilt.cc: Use is_universal() instead of is_deterministic().
* bin/common_hoaread.hh, bin/common_trans.cc, bin/common_trans.hh,
bin/ltlcross.cc, bin/ltldo.cc: Factor some bits common between
ltlcross, ltldo and autcross.
* tests/core/autcross.test, tests/core/autcross2.test: New files.
* tests/Makefile.am: Add them.
* tests/core/dra2dba.test, tests/core/sbacc.test,
tests/core/streett.test: Use autcross.

* spot/parseaut/parseaut.yy, spot/parseaut/parsedecl.hh,
spot/parseaut/public.hh, spot/parseaut/scanaut.ll: Use a reentrant
scanner, so that we can now parse multiple automaton streams at the
same time.  This is needed for the future autcross, which is going to
read several individual automata produced by different tools, while
reading the stream of automata to process.

* bin/autfilt.cc, bin/dstar2tgba.cc, bin/common_hoaread.hh: The
filename is stored in the parsed automaton, so do not pass it another
time to the printer.

* bin/autfilt.cc, bin/dstar2tgba.cc: Move the common
hoa_processor class ...
* bin/common_hoaread.hh: ... here.

* bin/common_trans.cc, bin/common_trans.hh, bin/ltlcross.cc,
bin/ltldo.cc: Rename translator_spec and translators to tool_spec and
tools, so that we can reuse these structures for automata tools
in a future autcross.

* bin/common_color.cc, bin/common_color.hh: New files, with
code extracted from ltlcross.cc.
* bin/Makefile.am: Add them.
* bin/ltlcross.cc: Simplify.

* spot/parseaut/parseaut.yy: Here.

Operator &= used to always move Fin to the front, it does not anymore.
The only thing it does now is to merge Inf(x)&Inf(y) as Inf({x,y}).
Operator |= is now symmetrical and merges Fin()s.

Fixes #253.

* spot/twa/acc.cc, spot/twa/acc.hh: Simplify &= and make |= symmetrical.
* spot/twaalgos/cleanacc.cc: Fix conjunction order.
* tests/core/acc.test, tests/core/acc2.test, tests/core/parseaut.test,
tests/core/readsave.test, tests/core/satmin2.test,
tests/core/sccdot.test, tests/python/acc_cond.ipynb,
tests/python/accparse.ipynb, tests/python/automata.ipynb,
tests/python/product.ipynb, tests/python/randaut.ipynb: Adjust test
cases.

Fixes #258.

* spot/twaalgos/copy.cc: Delete, and move the code...
* spot/twa/twagraph.cc: ... in some anonymous namespace here.
* spot/twa/twagraph.hh: Adjust the make_twa_graph() overload.
* spot/twaalgos/copy.hh, NEWS: Mark copy() as deprecated and redirect
to make_twa_graph().
* doc/org/upgrade2.org, doc/org/tut51.org, python/spot/impl.i,
spot/twaalgos/dot.cc, spot/twaalgos/langmap.cc, tests/core/ikwiad.cc:
Adjust callers.
* spot/twaalgos/Makefile.am: Remove copy.cc.

* spot/twaalgos/complete.cc: Here.
* tests/python/dualize.py, tests/core/complete.test: Adjust test cases.

Fixes #276.

* spot/twaalgos/sbacc.cc, spot/twaalgos/degen.cc: Detect accepting
sinks, and merge them.
* tests/python/dualize.py: Adjust.
* tests/python/sbacc.py: More test cases.

* spot/priv/bddalloc.cc: Add hooks on request.
* bin/man/spot-x.x, NEWS: Document the envvar.

* src/bddop.c, src/bddx.h, src/cache.c, src/cache.h, src/kernel.c,
src/kernel.h, src/prime.c, src/prime.h, src/reorder.c: Use power of
two for the sizes of all hash tables, in order to reduce the amount of
divisions performed.  Also allow bddhash to be smaller than bddnodes.

They were not updated since we moved binaries around in Spot 2.0.
Let them use ltl2tgba directly.

* bench/ltlclasses/plot.gnu, bench/ltlclasses/run,
bench/ltlcounter/plot.gnu, bench/ltlcounter/run: Adjust.

Fixes #273.

* NEWS: Mention this.
* spot/twaalgos/dualize.cc, tests/python/dualize.py: Adapt dualize.
* spot/twaalgos/sbacc.cc, tests/core/sbacc.test: sbacc support
  alternating automata

* NEWS: mention the modification.
* python/spot/impl.i: makes to_weak_alternating visible from python
* spot/twaalgos/Makefile.am, spot/twaalgos/toweak.cc,
  spot/twaalgos/toweak.hh: Implements to_weak_alternating.
* tests/Makefile.am, tests/python/toweak.py: Test the results of
  to_weak_alternating.