It's the work by @jroweboy (who will continue on it in the future).
Also we don't care / want to discuss unofficial builds here. These often include copyrighted files which mean legal trouble for the project and they could also contain malicious code (viruses) etc.
Some also happen to violate our license which is also problematic.
We only provide Bleeding Edge (without support) and the Nightly Builds (with support).
Unofficial builds is against our community guidelines for the reasons mentioned above.
If you want to discuss those you'll have to use another forum (but we don't recommend it for the reasons mentioned above).
We still enocurage working with the source code and developers are free to talk about their upcoming changes and current work. We just don't want third parties to do this unless they know what they are doing + we don't want any sort of preview releases aside from the official Bleeding Edge
If a feature is not part of official builds (Nightly or even Bleeding Edge) there is usually a very good reason for that.