In HTTPS calls to RTD (on HTTP) in js are blocked.

External JavaScript will be blocked by default as insecure content. Thankfully, because RTD is somewhat awesome it supports HTTPS, so its a very simple change. See below for the issue without the change.

![Screen Shot 2013-02-23 at 13 40 59](https://f.cloud.github.com/assets/48211/188077/b1bc4fa4-7dbe-11e2-95d1-4141745eebb4.png)