* Fixed Xray displayable not updating when its children supplied no image attributes.
* Defined default zorders on children of Xray displayable
* Posed parts of the event
* Added support for image references
* Added support for LayeredImage, and LayeredImageProxy
* Added the ability to use show statements as a proxy for Xray displayables
* Added previously omitted mask child to the visit method
* Restored automatic image definitions (As a part of CG implementation effort)
* Fix `fem` caller unnecessary arguments (Caused by regex most likely)
* Fixed xray displayable opaque Render flag (superseded by internal Ren'py changes)
* Fixed Doll animation concatenation to list
