* I think this has been done cleanly from inspection and testing, but if prim creation or load suddenly starts playing up more than usual, please open a mantis
* This also has the effect of stopping the archiver generating ghost in-world prims
* Some code dupliction also removed
* Adding to a scene is now parameterized such that one can choose not to actually persist that group
* This is to support a use case where a module wants a scene which consists of both objects which are persisted, and ones which are just temporary for the lifetime of that server instance
* This module more or less crashes every region in the instance if you enable it by moving it from local /bin to global /bin
* But hey, it crashes in lots of interesting ways.
