Fix camera heading when north is more in the xz-plane than the xy-plane.
Merge branch 'master' into cameraHeading
Merge branch 'master' into cameraHeading
Implement another way to compute the camera's heading.
Merge branch 'master' into cameraHeading
Merge remote-tracking branch 'origin/master' into cameraHeading
Merge pull request #1156 from AnalyticalGraphicsInc/cameraHeading

Camera Heading