Turn your PCX graphic files into VS format files so they can be read by the VSCC.

VS graphic format is Transparency-Length Encoded (TLE) instead of PCX's Run-Length Encoding. It less compressed, but it's faster to blit to the screen during play.

The expected input PCX file is 320x200x256; the program auto-crops out all the same-color background.

This thing also auto-creates the flipped version of the graphic, so it is in the output as well.
