Windows support

[Wavelet303]

First of all, congratulations for your great work. I currently use softgroup to perform instance detection and want to replace it with your work. I only need to make the inference with a 3d scene obtained by Bundlefusion. I am a windows user and have installed all the python packages with no problem. The only problem I have found is the use of MinkowskiEngine since it is not compatible with Windows. My question is if you know if I can make the Box2Mask method compatible with Windows, taking into account that I am only going to perform the inference of the model and that the MinkowskiEngine only works on Linux. Thanks for your attention