Add script to collapse / show nav bar.
Add css for menu.
Add layout and main divs.
Fixup nav include to remove horizontal.
Layout div doesn't have a pure-g-r.
Make sure we have a menu div.
Remove pure-u-1 from header and content classes.
Remove max-width on content div.
Remove pure-u-1 from contentinfo footer.
Remove pure-u-1 from about page.
Don't increase font-size for content p elements.