previous change (bfs_steps_with_path_conditions turned up useless), and document bfs_step.
class. * src/tgbaalgos/bfssteps.cc: Remove includes that are now superfluous.
* src/tgbaalgos/Makefile.am (tgbaalgos_HEADERS, libtgbaalgos_la_SOURCES): Add them. * src/tgbaalgos/gv04.cc (gv04::result::accepting_run): Use the new bfs_steps class.