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 master to quaternion
Remove conjugate from dynamic scene and add it to unpackInterpolationResult.
Updates based on review.
Merge branch 'master' into quaternion

Conflicts:
	CHANGES.md
Merge pull request #1229 from AnalyticalGraphicsInc/quaternion

Quaternion Rotation Direction
Upgrade RequireJS to version 2.1.8, and Almond to 0.2.6.
Merge pull request #1235 from AnalyticalGraphicsInc/updateRequireJS

Upgrade RequireJS to version 2.1.8, and Almond to 0.2.6.
Merge remote-tracking branch 'origin/master' into cameraHeading
Merge pull request #1156 from AnalyticalGraphicsInc/cameraHeading

Camera Heading
Merge master to trs