First version of pages:not_found. Probably need to render as rails page.

Right now we just stick a 404.html in public. We should probably
render it with

  rescue_from ActionController::RoutingError, :with => :render_not_found

and possibly do an inline render of the same page with rails into
404.html, or tell the user how to do so.
#8 Not found generator catches routing errors with Rails 3.0 - Rails 3.2.
#8 remove default 404
#8 warn user about consider_all_requests_local
#8 Enable link back home.
#8 Clearfix to push layouts with a footers below recent content links.
#8 Fixed accesses to Rails version.
#8 Fix bug where template engine was not specifiable.
#8 Using empty errors layout for 404 error templates. others dont work well.
#8 in midst of resolving erb/haml disagreements
Cenetered error pages (404) with container.
Fix whitespace erb/haml disagreement.
Fix style indentation for erg/haml agreement.
Using more correct render (erb) for erg/haml agreement. will fix haml.
Giving up on haml/erb agreement for 404 not found.
#8 Feature complete. Screenshot included. Merging.
Merging in feature/not_found_page.
Test suite all green - minor mismatch in foundation google contact page.
Added Foundation layout/page screenshots.