hoaparse: rename to parseaut

Because this parser is not specific to HOA anymore.

* src/hoaparse/Makefile.am, src/hoaparse/fmterror.cc,
src/hoaparse/hoaparse.yy, src/hoaparse/parsedecl.hh,
src/parseaut/public.hh, src/hoaparse/hoascan.ll,
src/tests/hoaparse.test: Rename to...
* src/parseaut/Makefile.am, src/parseaut/fmterror.cc,
src/parseaut/parseaut.yy, src/parseaut/parsedecl.hh,
src/hoaparse/public.hh, src/parseaut/scanaut.ll,
src/tests/parseaut.test: ... these, and also adjust the name internally.
For instance hoa_aut_ptr is now parsed_aut_ptr; hoa_stream_parser is now
automaton_stream_parser, and hoa_parse() has become parse_aut().
* NEWS, README, configure.ac, doc/org/tut20.org, src/Makefile.am,
src/bin/autfilt.cc, src/bin/common_aoutput.cc,
src/bin/common_aoutput.hh, src/bin/common_conv.cc,
src/bin/ltlcross.cc, src/bin/ltldo.cc, src/tests/Makefile.am,
src/tests/complementation.cc, src/tests/ltl2tgba.cc,
src/tests/readsave.test, wrap/python/ajax/spot.in,
wrap/python/spot.py, wrap/python/spot_impl.i,
wrap/python/tests/automata-io.ipynb, wrap/python/tests/parsetgba.py:
Adjust.

README

@@ -139,7 +139,6 @@ src/              Sources for libspot.
       man/        Man pages for the above tools.
    dstarparse/    Parser for the output of ltl2dstar.
    graph/         Graph representations.
-   hoaparse/      Parser for HOA automata and Spin's never claims.
    kripke/        Kripke Structure interface.
    kripkeparse/   Parser for explicit Kripke.
    ltlast/        LTL abstract syntax tree (including nodes for ELTL).
@@ -147,6 +146,7 @@ src/              Sources for libspot.
    ltlparse/      Parser for LTL formulae.
    ltlvisit/      Visitors of LTL formulae.
    misc/          Miscellaneous support files.
+   parseaut/      Parser for HOA automata and Spin's never claims.
    priv/          Private algorithms, used internally but not exported.
    ta/            TA objects and cousins (TGTA).
    taalgos/       Algorithms on TA/TGTA.