The search camera angle is 20 degrees, not 25 below horizon
Swap and re-calibrate center camera pair
Merge branch 'master' into devel

Conflicts:
	ros_workspace/src/samplereturn/calibration/ffmv-center-left-752.yaml
	ros_workspace/src/samplereturn/calibration/ffmv-center-right-752.yaml
	ros_workspace/src/samplereturn/launch/navigation_camera.launch