Added model loader registry
Added B3D loader
Fixed some mistakes in model path resolution, restructuring of in-memory b3d model reprasentation, b3d baking half done
static geometry bakes
more work on animations
added face normal generation
updated B3D loader to the new version of IModel
reversed node-kind composition to simplify graph lookup
animations work, textures work (path mapping is trivial for now), added example model/texture to the repo