pgmtoims.icn: Program to make an image from a PGM file

Usage:  pgmtoims [-gn] [file]

Pgmtoims reads a PGM rawbits file and writes an Icon image string.
The "-gn" option (2 <= n <= 64) selects the palette; g41 is the
default.

Note that only rawbits-format PGM files can be read.