I wish they would just make HTML previews work instead of hardcoding specific use cases with 3d models and geodata. Eg why can't github just let visitors previ

I wish they would just make HTML previews work instead of hardcoding specific use cases with 3d models and geodata. Eg why can't github just let visitors preview this html file: https://gist.github.com/dergachev/5769111#file-index-html https://gist.github.com/dergachev/5769111#file-index-html For now, I have to link bl.ocks.org, which is nice but far from perfect. And check out http://htmlpreview.github.io http://htmlpreview.github.io (I understand that there are security concerns, but I'm sure they can be addressed with an iframe or by clicking an external link)