Widen Job list to accommodate new columns

* Upgraded Rivets to latest release for performance fixes
* Moved left column to top to widen jobs list
    ![screen shot 2013-12-03 at 5 41 22 pm](https://f.cloud.github.com/assets/29612/1720261/cf790eb0-61fc-11e3-946d-c74eba5564ed.png)
* Skip optimizing full JS directory since only `main.js` needs to ship