Realized that uart_sendBytes won't work, because checksum isn't calcualted. Reverted to sending single bytes

Fixed issue with UART timeout interrupt not firing. Added BENCH_TEST mode for testing communication.

Integrated changes from comm_dev (interrupt-driven UART) and updated code to work well with the new style. Compiles, but have not tested running yet.

Autonomous mode is throttle-only. Fixed bug in stringBuilder that would fail to resize byte data. Packets that don't have a matching checksum are thrown away now.

Also stop committing Debug c object files