jack davis

Improve Simple001: - Correct board mount hole locations - Add jumpers or solder bridges to support 6th fan PWM on Teensy LC, 3.2, 3.5, 3.6, and 4.0 - Remove AREFVCC...

To support a possible RuntimeConfigV2, use a union message to wrap the RuntimeConfigV1 protobuf. Fe.: https://developers.google.com/protocol-buffers/docs/techniques#union https://github.com/nanopb/nanopb/tree/master/examples/using_union_messages

Complete an initial version of documentation: - Usage/Getting Started - Example data - Detailed configuration - PID tuning - Hardware constraints (fe. no-save on Teensy LC, pin setup, etc.)