Moved div.foot to footer.foot. Footer is more semantic.

Hey Kalin,

Did a few small things to hopefully help you out. 

- Moved nav div to a nav element.
- Removed list of ul elements that did not have li as children.
  ul and ol elements must have li elements as direct children.
- Moved script tag and js include to the bottom of page right before the close of body tag. This will
make the page load faster.

Let me know if you have any questions.