gh-pages branch missing? #112

I see there were some old PRs targeting the gh-pages branch, but it doesn't appear to exist any more. I also see a readthedocs page, but it seems mostly empty.

We currently serve https://matplotlib.org/cmocean out of the matplotlib.github.com tree, but that seems less-than-ideal for updates, as it's about a 10GB clone.

If you can restore the gh-pages branch, then I can change the website to start serving from here, which should be easier for you as the docs would be self-contained on this repo.