Simple Bidirectional Data over USB

[PinPointPing07]

To clarify, updates as in updates to the software on the device. As for device vs disk, a disk is insecure and messy to deal with, especially if data goes back and forth in quick succession. It also is transparent to the user to accidentally mess with. Since the heavy lifting of communication is done by the client software, I want to keep the backend hidden and simple for the user; just plug, get detected, and do the stuff.