Initial code for Navigation Bar

Basic code in JavaScript to create the navigation bar, add a "Home"
link, and place at the top of the page.
Added topics to nav bar

Added HTML5 Data to each topic and JS code to iterate through them and
fetch that data for the nav bar. Next step is to make them actually link
using anchors. Impacts: #4
Added basic navlink css

Added css rule for navigation links to align them horizontally and space
them evenly
Finished nav bar v1

closes #4
Added css to allow nav bar to stay on top without occluding section
headings. Finished js to create all links with proper hrefs.
Merge pull request #7 from DavidGinzberg/JS

JS and CSS Changes for Navigation Bar