Add Code Good Sunday page to site

#### Adds [#CodeGoodSunday](http://codemontage.com/code_good_day)
This PR builds on design and code by @sarony in #185, with a few major changes:
* Refactors #CodeGoodSunday to a page within the Home controller instead of a standalone controller
* Generalizes code to code_good_day instead of code_good_sunday specifically
* Adds use of [Zurb Foundation framework](http://foundation.zurb.com) & simplifies styling
* Removes unused files generated by scaffolding