Colors on VGA are 6bit per color channel, that is why the colors
were so dark in earlier commits. Shifting the colors left by 2 gives us
an approximated value for CLUT8.
Mistakenly, during image loading the system palette was completely
substituted by the image palette although the first 16 colors are
supposed to be preserved.
There has been many other changes like copy/pasting room definitions,
skeleton for image decoder, ..
Getting supernova mod format support seems to be a good next step.
