- StructTypes no longer need to be registered
- Move backend.source to core.source
- Move GameStateRegistry to core
- Backend is static again
- Loader maintains state internally
- More documentation/clean up some old docs
- isFirstLoad check on GatherContextEvent
- Instancers no longer crash on empty model
- setIdentity on MatrixTransformStack
- more utilities for TransformStack
- ModelData "nullification"