Save Scene as... and CameraObject

[drouin-simon]

Camera data (images and transforms) are not saved

[nist-anka]

As I see video buffer is serialized, so the images should be saved,
Lens Displacement Transform is not saved. I am not quite sure what I should do here.Should I add
something like
::Serialize( ser, "LensDisplacementTransform", m_lensDisplacementTransform );

after void CameraObject::Serialize( Serializer * ser )
{
TrackedSceneObject::Serialize( ser );
SerializeLocalParams( ser );
::Serialize( ser, "TrackingCamera", m_trackingCamera );