Remove concerned about getting stuck in a loop, watchdog will reset.
Clean up resolved TODOs.
Read payload for incoming EP0 transfers on PIC32.
Share implemenation of MIN macro.
On chipKIT, if UART is on with A1 pulled to ground, don't init BT.
Use USB config state from PIC32 library instead of VBUS detection.
Disable WDT on PIC32 for now, see #226.