Expose gyroscope calibration from WPILIB

[porglezomp]

We need to create a WPILIB gyrosocope and wrap that with a Strongback gyroscope so we're able to perform calibration at a later time. It'd be nice if we didn't have to fall back to WPILIB for this.

[rhauch]

Sounds good. Do you want to create a pull request?

[porglezomp]

I'd be happy to, it'll probably be a few days, since I haven't really worked with the Strongback internals.