|SOURCE|
[Linux::Arithmetic::Quaternion]
* AsVector returns the X, Y, and Z components of the Quaternion, this is only
  useful for rotations and it assumes the quaternion is of unit length
* IsUnit returns ZED_TRUE if the Quaternion's magnitude is equal to 1.0f,
  otherwise ZED_FALSE is returned
|SOURCE|
[Common::Arithmetic::Quaternion]
* Added SetIdentity which sets the quaternion to 1, 0, 0, and 0 for the W, X,
  Y, and Z components, respectively
* Added IsIdentity which returns ZED_TRUE if the quaternion is equal to 1, 0,
  0, and 0 for the W, X, Y, and Z components, respectively