Remove thin light border around boxes

This is a quick and dirty fix, the borders should be removed and horizontal spacings recalculated to account for the lost pixels and `.box_inner` divs removed as well.

![ ](http://3.bp.blogspot.com/-tKgAExD5SNo/UmMrf3twYYI/AAAAAAAAAGk/dBkv8DnvyXY/s320/OnePlusIPlusZSquared2.gif)