Custom Demo Pattern Support

[RGB-123]

Yona, I was wondering what it would take to add a simple c-file that would allow custom led patterns to be done. I envision it would basically be an extension of the current opc-server functionality, but rather than running a "demo" pattern it would run custom defined patterns. Ideally though, this would occur outside of the opc-server code. It some ways it would be similar to (https://github.com/Yona-Appletree/LEDscape/blob/09cea258c8efba1708a9aa5c36174262013b3b76/red-test.c) but would retain the dithering, interpolation, and pin mapping functionality of opc-server. Ryan

[Yona-Appletree]

My current plan on this is to allow specifying a demo program that LEDscape would execute and accept frames via standard-out from...more details to come.