adds a navigational menu for docs

Which is basically pulling JS+CSS from the HTTP service shown in the src to the `<head>` tag.

Links to browsershots showing compatibility in almost every browser (lol Konkeror) 

http://browsershots.org/http://ceph.com/docs/wip-8366/radosgw/

![09-04-2014-13-09-33](https://cloud.githubusercontent.com/assets/317847/4153287/f8424c94-3456-11e4-86d9-d41b584d39e4.png)