Log message:
Add a package for Ishkur CP/M, an open source, modular CP/M distribution for
the NABU computer.  It is designed to work with both server-based (disk images
or native file access over NHACP) and local storage options.

This package provides a convenient method to install these binaries on
a system that can vend them to a NABU PC using a NABU server, or build
disk images with the binaries using cpmtools.