3/5/14 - Lots of changes to driving code

Fixed spelling error in Mecanum. Renamed DriveMotorIndex to DriveMotorData to reflect new static variable called DriveMotorData.maxEncoderRate. Modified MecanumDrive to incorporate the PIDController class and use encoders to regulate the drive speed to an angular velocity between 0 and DriveMotorData.maxEncoderRate. All code is untested since I wrote it at home. DriveMotorData.maxEncoderRate and the PID constants need to be tuned at the competition using Progress.

Signed-off-by: Tushar Pankaj <tushar.s.pankaj@gmail.com>
Moved PID constants from MecanumDrive to DriveMotorData

Signed-off-by: Tushar Pankaj <tushar.s.pankaj@gmail.com>