Responsive footers

Grids now collapse to a mobile pagination UI when any instance of a grid does not have a large enough footer to display its contents. If resized to have enough space, all grid will then revert to a normal pagination UI.

A new set of static state fields have been added in order to pass data between multiple instances of griddly bear.
![ukl8tjg](https://f.cloud.github.com/assets/1823879/1246309/26a390c6-2aac-11e3-95dc-c394dbdafb2a.gif)