Need some lightweight commands for the ci module

[jessehamner]

It would be helpful if there were some command line flags and supporting methods for, e.g., "power the board up" with no flash/binary required. You can do this by jumping into a Python shell and creating a specific instance of a Target object, then myboard.setupboard(), then myboard.powerup(), but a lightweight path to that simple goal is worth doing. I'm self-assigning it.