Universal Print connector UNIX edition

ThomasKurth_ch 

Thanks for posting.

Although we don't intend to create a Microsoft connector that runs on Unix, we documented how to build a connector. 

Some of our partners created their own connectors based on that guidance. We intend to continue to improve this documentation to make it even easier for partners to create connectors on any platform. 

Raspberry pi support would be really great as long not all printers support Universal Print natively.