Use local resources, fonts etc

[aflaherty13]

Download from CDN and use locally at least for testing as they are a large part of the network pause when the tests are waiting for the page to load. This is exaggerated by the fact that the browser does not cache when running the tests as it uses a new user profile to start the tests in.

The existing templating system should cope with allowing us to render CDN results for a "PRODUCTION" env value by using the env value along with content sections.