-------------------------------------------
var,funct (left-click): save edited images
  set inoutim <outfile>
  write_images
-------------------------------------------

If images are edited, the SAVEIMG button asks to
confirm overwrite of the originally-read-in image
set using the original filename.

If tkmedit is quit with unsaved edits, you have a
chance to save them (N.B.: quitting tkmedit by
ctrl-C or "exit" at tcl prompt doesn't ask).

N.B.: SAVEIMG ignores any change you might have
made to the image name in the "im:" field (e.g.,
by reading in a different image set!).  If you
want to change the name you are saving to, enter
a new name in the "im:" entry and use the "W"
button there.
