Updated face.js to export scale data as well

[kgediya]

Calculate dynamic scale to augment perspective camera Example usage -

trackedObject.position.copy(track.position)
trackedObject.rotation.setFromRotationMatrix(track.rotation)
trackedObject.scale.setScalar(originalScale*track.scale)

[michaud]

tried this and it works well. Maybe the solution should be more in the spirit of the OG code and integrated in the class?