A quick & dirty OS4 port of Michal Letowski's xpk.datatype
(http://aminet.net/package/util/dtype/XPKDT-1.0B).

Porting was a bit more "interesting" on this one since for some reason only the
.c files were included in the aminet archive. Fortunately they weren't too
unusual so I could quite easily recreate them from looking at the sources.

The XFD and xfdmaster.l.main files included in the archive are the work of Chris
Young.

Installation:

1. copy xpk.datatype to SYS:Classes/DataTypes
2. copy XPK, XFD and "Power Packer" descriptor files to DEVS:DataTypes
3. copy xfdmaster.l.main to LIBS:

Also you will need OS4 native xpkmaster.library or xpkmaster.l.main glue file in
order to use this datatype.

xfdmaster.l.main glue file is included in this archive and should be copied to
LIBS: as per the instructions above.

Some useful links:

 - http://aminet.net/package/util/pack/xpk_User (xpkmaster, 68k version)
 -
http://os4depot.net/index.php?function=showfile&file=library/misc/xpkmaster-glue
file.lha (xpkmaster, PPC -> 68k gluefile)
 - http://aminet.net/package/util/pack/xfdmaster (xfdmaster, 68k version)

File types I have tried:
 - textfiles
 - pictures (ILBM mostly)
 - sounds (RIFF-WAVE only)
 - AmigaGuide

All seemed to work fine for me.

Changes:

39.2:
 - added XFD and xfdmaster.l.main files
 - modified xpk.datatype so xpkmaster.library always sends unrecognised files to
xfdmaster.library
 - fixed bug regarding the "click" areas of sound files and AmigaGuides

39.1:
 - first released version