save: remove

Get rid of the output in Spot's format.

This finally fixes #1.

* src/tgbaalgos/save.cc, src/tgbaalgos/save.hh: Delete.
* src/tgbaalgos/Makefile.am: Adjust.
* src/ltlvisit/contain.cc: Remove useless includes.
* src/bin/dstar2tgba.cc, src/bin/common_aoutput.cc,
src/bin/common_aoutput.hh: Remove the "Spot" output.
* doc/org/dstar2tgba.org, doc/org/ioltl.org,
doc/org/ltl2tgba.org, doc/org/oaut.org: Update doc.
* NEWS: Mention that Spot i/o is gone.
* src/tgbatest/randtgba.cc: Output in HOA.
* src/tgbatest/randtgba.test: Use randaut instead of
randtgba.
* wrap/python/spot.i: Do not provide binding for save.hh

doc/org/ltl2tgba.org

@@ -275,8 +275,9 @@ ltl2tgba --help | sed -n '/Output format:/,/^$/p' | sed '1d;$d'
                              acceptance even on Büchi automata)
       --name=FORMAT          set the name of the output automaton
   -q, --quiet                suppress all normal output
-  -s, --spin                 Spin neverclaim (implies --ba)
-      --spot                 SPOT's format
+  -s, --spin[=6|c]           Spin neverclaim (implies --ba).  Add letters to
+                             select (6) Spin's 6.2.4 style, (c) comments on
+                             states
       --stats=FORMAT         output statistics about the automaton
 #+end_example