typo in the README.md

[dwilliss]

There's a paragraph in the README.MD that says

The Serial2 TTL header is by default a Marcduino serial command receiver running at 9600 baud. It will forward any serial data to Serial2 at 9600 baud. Allowing you to daisy chain the AstroPixels board with other Marcdunio compatible serial devices.

Presumably, one of those should say Serial0.
Also, according to the code, it defaults to 2400, not 9600.