Rotate Command w/ NavX Gyro

[roshanr10]

Take a look at 2017 robot code if unsure of concept. Should be a basic PID command.

This'll need another method in the BionicDrivetrain class that allows for accessing the angle of the NavX as well as one directly accessing robot arcade drive.

Should be implemented as a WPILib PIDCommand called BionicRotateCommand(BionicDrivetrain drivetrain) which takes an input set point in degrees.