Loading options are ignored

[tarrouye]

Upon discovering that setting the options parameter in GLTFSceneSource.init or GLTFSceneSource.scene didn't affect the output, I checked the source only to realize that these options don't appear to be used anywhere by GLTFKit.

Is this intentional? Is there any plan to support these? If not I might suggest to simply remove the parameter from those functions because as it stands right now it's misleading.

Thanks for your time. The library is greatly appreciated.