app list layout pages (bug 1103294)

The new images assets are still missing but I'm adding them shortly.

![](https://s3.amazonaws.com/f.cl.ly/items/0j0325183c323n112m3V/Image%202014-12-17%20at%204.35.58%20PM.png)

![](https://s3.amazonaws.com/f.cl.ly/items/1V0v1P3d2w1H0P043Q2O/Image%202014-12-17%20at%204.36.41%20PM.png)
2 spaces for inline comments (we do this everywhere else (js/css/python))