StyleGAN reference implementation weights

The weights of StyleGAN in PyTorch format.
The weights are (c) by NVidia Corporation and licensed under CC-BY-NC. See the linked page for details.

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This is exactly the same as at https://github.com/lernapparat/lernapparat/releases/tag/v2019-02-01, but I have renamed the weights file for the Pytorch hub convention:

The filename part of the URL should follow the naming convention
    ``filename-<sha256>.ext`` where ``<sha256>`` is the first eight or more
    digits of the SHA256 hash of the contents of the file. The hash is used to
    ensure unique names and to verify the contents of the file.