DataFlash : Add 5th EKF packet for optical flow debugging
Copter : change optical flow to use angular velocity measurements
AP_AHRS : change optical flow measurements to use angular velocity
AP_NavEKF : change optical flow measurements from pixels/sec to rad/sec
AP_NavEKF : Inhibit flow fusion into main filter for test flight
AP_NavEKF : enable use of optical flow measurements for test flight
AP_NavEKF : Add optical flow data logging