* src/tgbaalgos/tau03.cc: Suppress optimisations, the algorithm is now
the original one.
* src/tgbaalgos/tau03opt.hh, src/tgbaalgos/tau03opt.cc: New files
implementing most of all the optimisations of tau03.
* src/tgbaalgos/Makefile.am: Add them.
* src/tgbatest/ltl2tgba.cc, src/tgbatest/randtgba.cc: Make them public.
* src/tgbatest/tba_samples_from_spin.test: Test them.
* src/tgbaalgos/Makefile.am (tgbaalgos_HEADERS)
(libtgbaalgos_la_SOURCES): Add them.
* src/tgba/tgbaexplicit.hh (tgba_explicit::add_state): Make it public.
* src/tgbatest/randtgba.cc: New file.
* src/tgbatest/Makefile.am (noinst_PROGRAMS, readsave_SOURCES): Add it.
* src/tgbatest/readsave.test: Check a random graph.