update readme with stuff found in code
fix off by one error initing val/aux buffers
first go at handling commands device-side — this really won't work due to text-based framing protocol (print and createChar)
Revert "first go at handling commands device-side — this really won't work due to text-based framing protocol (print and createChar)"

This reverts commit d61ef40b5ab5b5167dc0c0f575dc7ee573351588.