New Browse

First stab at new browse. There are still things to do to make it work correctly but this is a first pass at getting it work. As it doesn't register routes it can't be seen in production but we will be able to manually force preview to show it so we can start testing it.

https://www.pivotaltracker.com/story/show/72442208
tiny weenie thing but you're using slug.indexOf('/') in a 3 if statements to check if something is a subsection or a section, it would aid (my) comprehension if you made it a function or variable or something.