(zone-replace-char): Take `count' and `del-count'
instead of `direction'. Update callers. When `del-count' is
non-nil, delete that many characters, otherwise `count' characters
backwards. Insert the newly-replaced string `count' times.
(zone-fret): Handle chars w/ width greater than one.
(zone-fall-through-ws): No longer take window width `ww'.
Update callers. Add handling for `char-width' greater than one.
(zone-pgm-drip): Update var holding window-end position every cycle.
Also, init `tab-width' with value from original buffer.
(zone-shift-up): Rewrite for speed.
(zone-shift-down, zone-shift-left, zone-shift-right): Likewise.
(zone-pgm-jitter): Remove redundant entries from ops vector.
(zone-exploding-remove): Reduce iteration count.
(zone-cpos): Convert to defsubst.
(zone-replace-char): New defsubst.
(zone-park/sit-for): Likewise.
(zone-fret): Take window-start arg.
Update callers. Use `zone-park/sit-for'.
(zone-fill-out-screen): Rewrite.
(zone-fall-through-ws): Likewise. Update callers.
(zone-pgm-drip): Use `zone-replace-char'.
Move var inits before while-loop. Use `zone-park/sit-for'.
(zone-pgm-random-life): Handle empty initial field.
Use `zone-replace-char' and `zone-park/sit-for'.
(zone-fill-out-screen): New func.
(zone-pgm-drip): Use `zone-fill-out-screen'.
Also, no longer go to point-min on every cycle.
(zone-pgm-paragraph-spaz): Allow spazzing for texinfo-mode.
(zone-pgm-random-life-wait): New user var.
(zone-pgm-random-life): New func.
(zone): Don't fiddle with the idle timer at all.
(zone-when-idle): Put the idle timer in zone-timer.
If one is already set up, cancel it and make a new one.
(zone-leave-me-alone): Likewise.
(zone-hiding-modeline): New macro.
(zone-call): New func.
(zone): Init `modeline-hidden-level' symbol property.
Use `zone-call' instead of `funcall'.
(zone-pgm-whack-chars): Use `make-string' (bug introduced in 2001-10-26T20:11:25Z!monnier@iro.umontreal.ca).
(zone-pgm-stress): Use `zone-hiding-modeline'.
(zone-pgm-stress-destress): New zone program.
