Support for masked style transfer?

[ProGamerGov]

Both NeuralImageSynthesis, and deep-photo-styletransfer support masked style transfer, where one uses mask images as guides. The latter supports mask images with multiple colors instead of the traditional black and white mask images.

Would masked style transfer be possible for Style_Transfer?

Edit: I see you removed mask support in this commit here: https://github.com/crowsonkb/style_transfer/commit/fc4ea2f7c985388e30efa0de697d07ae2daedea3, but why?