Fixing Navbar Issues

This PR fixes several things:

- The broken collapsable navbar (we needed to make some minor changes to the HTML elements, as well as include the bootstrap js and jquery libraries).
- Cleans up styling on the navbar by enforcing color constraints (the navbar was transparent, now it is black to it matches the theme).

You can see how it looks here: http://recordit.co/AV9rp8Ts15

Fixes #39.