Remove functions linked to ng-click.

Changed button elements into anchors which removed the need for ng-click
functions.
Add nav bar to main and settings pages.
Add missing links to javascript.

Require jquery and bootstrap javascript in order to make the collapsed
nav bar work.

Also moved angular.js into js directory to make it consistent with other
vendor javascript.
Fix issue with body top padding breaking game layout.
Add footer to settings page.
Change links on main page.

Links to game and settings now take up full width of their columns. Link
to GitHub repository is now also a full width link to match the others.