My only concern is preserving URLs: putting them in the `gh-pages` branch means the URL would be e.g. `https://thoughtbot.github.io/liftoff/taballs/liftoff-0.1.1.tar.gz`.

Elsewhere (thoguhtbot/gitsh#40) @calebthompson mentioned using the release API on GitHub and treating the tarball as an asset. That'd be cool, too.

But overall: I'm not terribly concerned about all this.