* src/taalgos/dotty.cc: Clean up output of TAs.
* src/tgbatest/ltl2tgba.cc: Fix memory management, and use the TA
printer for TGTA.
* wrap/python/spot.i (as_ta): New function to convert a tgta_explicit
into a TA.
* wrap/python/ajax/spot.in: Use this new function to display automata.