Add MaskAnyone (video masking tool)

[DorienHuijser]

Shared on VU Amsterdam qualitative data in open science symposium: https://github.com/MaskAnyone/MaskAnyone It's possible that this is a follow-up of https://github.com/WimPouw/TowardsMultimodalOpenScience, which is now listed under Python de-identification tools. Need to investigate a little bit further :)