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
Remove unused vertices when reordering. Unused vertices would be mapped to the origin and cause an error during projection to 2D.
Add test.
Add another test.
Merge remote-tracking branch 'origin/master' into cameraHeading
Merge pull request #1156 from AnalyticalGraphicsInc/cameraHeading

Camera Heading
Merge pull request #1236 from AnalyticalGraphicsInc/issue1234

Remove unused vertices.
Merge branch 'master' into property-equals