2.5.18 released October 7, 1999

- reduced V_OBA in fuseki.c
- minor tuning
- more experimental move generation code
- new patterns in eyes.db
- bugfix in fill_liberty()
- test legality and safety of move much earlier in shapes_callback()
- autoconf test for glib so snprintf() can be replaced by g_snprintf
  if unavailable
- minor change in endgame() output to work around bug in NNGS connecting
  program