imgpaper.icn: Program to tile images to form wallpaper

This program tiles images to fill a window.

The supported options are:

     -s      read image strings from standard input; default, use
               image file names given on command line
     -p      read BLPs from standard input; default as for -s
     -w i    window width, default 640
     -h i    window height, default 480
     -g r    gamma; default to Icon default
     -m      manual mode; wait for event before going to next image
     -a i    automatic mode (default); hold pane for i seconds, default 2
     -l      list names of files on standard output
     -i      save GIF file of each image
     -n s    prefix for image names, default "paper"
     -b      fill window with black at end and hold for event
     -v      size for video recording, 342x240; overrides other settings
     -M      mirror image before tiling

In the case of the -m option for images, if the event is a letter, the
letter, a colon, and current image name is printed to standard output.
In case of the -m option for image strings, if the event is a letter,
the image string is written.