I'd like to be able to host different docs for different versions of my code. I know there are services like ReadTheDocs that handle this for you, but it would be nice to be able to deploy all the versions to GitHub instead. This would make the gh-deploy script a bit more complex (and there'd need to be some way of switching versions when browsing), but I think it would be generally useful.

Maybe there's an argument to be made that GitHub Pages are for hosting the in-development version of your docs, and places like ReadTheDocs are for released versions; I'm not sure. My instinct is that all the versions of the docs should be hosted in the same place, though.

Any thoughts about this?