Alright, false alarm. Root issue in my case was a faulty environment and/or operator that resulted in binaries being compiled for the wrong platform.
Once corrected, it compiled and launched your branch and connected to the gateway without incident. Next up is experimenting with the nodes and actuators. I'll see if the persistence file can be written to.
I typically launch either using hass or hass --open-ui from an administrative powershell session. No-go in either of these two cases.
Though I'm eager to try, I can't actually launch the Ethernet Gateway branch in a Windows environment. The best error I can provide is the generic failed to create process on calling hass. Platform is Windows Home Server 2011 running Python 3.5.1. All previous and current release branches of home assistant launch without error.
Any thoughts or other steps I can take to debug it further?