Updates to PDDEmulate script

This repo has all the changes required to get the codebase working with the London Hackspace's 950i. It's since been tested and confirmed working with 2 other 950i's. Specific bugs documented in the commits.

Also we've created blank patterns for various combinations of mylar sheets.

We haven't yet worked out how to get it to accept multi colour or variable widths/heights but we're getting there :-)