2.7.64 released April 2, 2000

- updated DJGPP info
- removed leading white space in windows.texi for more nicely formatted
  info files
- removed obsolete workaround for a texi2html missing feature.
- added members defendi and defendj to struct eye_data
- recognize_eye2 now returns point of defense as well as point
  of attack for an eye
- compute_eye now reports defense point as well as attack point
- recognize_eye2 now considers if the boundary of the eye is
  captured during eye reading
- speed optimizations in recognize_eye2
- 5 new functions in location_set.c
- small bugfix in showbord.c
- small bugfix(?) in main.c
- small cleanup in dragon.c
- new function mouse_effective_defense()
- if the mouse code is enabled, strategically_sound_defense() invokes
  mouse_effective_defense()