* src/tgbaalgos/lbtt.hh, src/tgbaalgos/lbtt.cc (lbtt_parse):
New function.
* src/tgba/tgbaexplicit.hh (get_acceptance_condition): Make it public.
* src/tgbatest/ltl2tgba.cc: Add a -XL option to read LBTT file.
* src/tgbatest/lbttparse.test: New file.
* src/tgbatest/Makefile.am: Add it.