Deluxe spinning action

![](http://i.imgur.com/QLdCn.gif)

Notes:
- The spinning will not stop until you reload the page or load another one. I feel like we shouldn't implement a feature to disable it, since it's not really needed.
- ~~This will affect ALL `<i>` tags across the site. This shouldn't be an issue, since all that's happening is a CSS class being added on, but we might want to eventually change this so it only looks for `<i>` tags that are actually being used for icons (via jQuery selectors with regex or something like that).~~ Fixed.
- ~~This doesn't make any images besides icons spin. I should probably fix this eventually.~~ Fixed.