Light Control Fixes and GLTF Punctual Light and Unlit Material Extensions

[sgold]

@tlf30

Too bad there is no way to pass settings to the importer and make it configurable.

Perhaps @pspeed or @sgold may have an idea.

I’m no expert on asset importers, but I believe there’s a way to pass settings. It involves defining a subclass of ModelKey that includes the settings, then passing that object to AssetManager.loadAsset() instead of a bare String. The AssetLoader then uses AssetInfo.getKey() to access the settings.