Initial Design Commit

Initial design commit focused on some type changes in order to aid scan-ability and readability.

Switched over to using Sass with the .scss syntax.

I added normalize.css as a Sass file. I am not sure how we are handling dependancies but it might be better to include this a different way (via bower or some other package manager). You can let me know.

Made two small changes to the markup: wrap the search in a header element and gave the search wrapper a class (prefer not to style based on id).

Just to note the layout nav uses the new flex box syntax so only works in Firefox nightly not Firefox latest. Not sure what sort of browser support we need and happy to change based on support required.