LICENSE.md missing

[stepheneb]

README.md describes this library as licensed under the GPL3 and refers to LICENSE.md. The file LICENSE.md doesn't appear to be in the repository.

[bboyho]

Hi!

Nice catch! I just noticed your issue when updating the README.md. Hmm, I think the engineer that originally wrote it didn't include it into this library. I just added the LICENSE.md that we usually use for our hardware and the one he intended to link for the code.