I never bothered to merge mine in, but @enbickar recently added this functionality in. It looks like it’s been merged into 0.82: https://github.com/home-assistant/home-assistant/pull/17645. The updated documentation isn’t up yet, but it’s at Updated to include new devices configuration by kbickar · Pull Request #6983 · home-assistant/home-assistant.io · GitHub.
You’re correct, I don’t use HASS.io, so I just loaded up the custom component in my Docker installation.