(Bug5073) Adjust masthead column spans
Change misspelled CSS name
(Bug5073) Retrofit Tropo home page

* The welcome box is now more flexible
* The background for it follows the height of both columns
* Reduced the number of background images needed
(Bug5073) Initialize Foundation Javascript

* Don't put Javascript into the jquery group; everything will need to be compatible with it now.
* Initialize the foundation JS
* Make the footer be a row