shorten_os4 3.6.0

Short:        Fast, low complexity waveform coder
Author:       Tony Robinson, Wayne Stielau, Jason Jordan, Brian Willoughby
Uploader:     fredrik a500 org (Fredrik Wikstrom)
Type:         util/pack
Version:      3.6.0
Architecture: ppc-amigaos >= 4.0.0

This is another "quick & dirty" port. Very little testing has been done,
but at least the "shorten" exe seems to be working OK. Only "problem" I
had was that while compressing it complained that it was unable to
delete a temp file (this can be done manually though, so probably isn't
so serious a problem).

The "port" is more or less a simple recompile of the original 3.6.0
shorten sources except for one function (swab()), that I had to implement
since it doesn't seem to be part of the clib.

More information on shorten can be found at the shorten website (above).