Initial attempt at code to generate icon masks on OS/2 from the background color when creating icons from file. This doesn't quite work, I clearly don't understand the format of the masks... the documentation says there are AND and XOR masks in the double sized mask bitmap.... not sure which goes where and how they are used... but this is a step in the needed direction.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=2
DW_MINOR_VERSION=4