message: Corrected the native protocol stream format docs
  The packet length field is currently only one byte, not two.
diff: @@ -59,10 +59,10 @@ __Response__
  The stream based format is just a wrapper for the packet format.
  - __Byte 0__ Sync byte `0xAA`
  - - __Bytes 1, 2__ Packet length
  + - __Byte 1__ Packet length
  - Currently both parties shall only emit and accept values of 0 through 127.
  - - __Bytes 3__ CRC8 of bytes 0 through 2
  + - __Byte 2__ CRC8 of bytes 0 and 1
  - See protocol.hpp for CRC details.
  - - __Bytes 4 to N-3__ Packet
  + - __Bytes 3 to N-3__ Packet
  - __Bytes N-2, N-1__ CRC16
  - See protocol.hpp for CRC details.
  