#486 Put's footer links into better columns

Fixes #486 

Makes default footer go from:

![Screen Shot 2013-03-21 at 12 04 00](https://f.cloud.github.com/assets/67366/285506/73d9acb6-921f-11e2-87ba-63783202740f.png)

To:

![Screen Shot 2013-03-21 at 12 03 38](https://f.cloud.github.com/assets/67366/285507/78d8d368-921f-11e2-8b91-f18853c81977.png)

__Note:__ Extensions that use `{% block footer_links %}` within templates will need updating