2.7.81 released April 28, 2000

- new function sniff_lunch (unused and untested)
- new function remove_string_and_mark
- originate_eye now public
- add_half_eye now takes half_eye array as an argument
- doc revision
- jump_out_helper() rewritten to use influence function rather than
  strategic distance
- matchpat_db() renamed to matchpat()
- redundant autohelper function singleton() removed