Move browse over from frontend and use new pattern

Move the browse pages from the frontend repo over to this application and style them as per the new prototype design for browse.

This will have a further pull request to add the dynamic loading of the pages but this should get the content onto the pages and style them in a basic way.

https://www.pivotaltracker.com/story/show/72441304
https://www.pivotaltracker.com/story/show/72441234