* fix: collection of vr fixes
* Node::additionalTransform() and Node::setNodeToParentTransform() can be used at the same time
* Node allocs _additionalTransform in runtime taking 60 bytes lees for 99% of the nodes
* Node calculates the transform faster when an additionalTransform is being used
* VR works when the camera is being moved manually with setNodeToParentTransform
* VR has its own tests
* VR can be disabled and works as expected
* doc: documentation for the new fix
* fix: restore submodule web
* fix: compile and link on iOS
* fix conflicts
Ricardo Quesada