This is a standalone version of the image codec which will be used for
rkive v2.00 when I eventually get it finished.

Accepts only 8-bit TARGA, 24-bit TARGA and 24-bit RAS (Sun raster format)
images.
This codec has been specifically designed for continuous tone images and so
will not work well with artificial images.

Please note that this is only a test program so use it at your own risk.

Changes:

20/6/1999 - Version 1.03
  Fixed a typo that was stopping it from decompressing 90% of all colour
  images using 'cx' mode.
  Tightened up the RAS type checking so that it now complains when given
  an RAS file that is not of the correct format.
