This simplify all laters invocations, because we do not have to pass
the automaton the run was generated on.
This fixes#113 by allowing the __str__ function to be implemented on
runs.
* src/twaalgos/emptiness.cc, src/twaalgos/emptiness.hh (twa_run):
Store the automaton.
(prin_twa_run): Rewrite as an overloaded <<.
* src/twaalgos/reducerun.cc, src/twaalgos/reducerun.hh (reduce_run):
Do not like the automaton as a parameter.
* src/twaalgos/replayrun.cc, src/twaalgos/replayrun.hh (replay_twa_run):
Likewise.
* src/bin/common_aoutput.hh, src/bin/ltlcross.cc,
src/tests/complementation.cc, src/tests/ikwiad.cc,
src/tests/randtgba.cc, src/twaalgos/gtec/ce.cc, src/twaalgos/gv04.cc,
src/twaalgos/magic.cc, src/twaalgos/ndfs_result.hxx,
src/twaalgos/se05.cc, src/twaalgos/projrun.cc: Adjust.
* wrap/python/ajax/spotcgi.in: Add a __str__ function to twa_run_ptr.
* wrap/python/spot_impl.i: Adjust.