New pages + lots of UI improvements

-Added privacy policy page
-Added/edited about page
-Added Pace.js splash screen to all pages
-Redesigned intro page--much more modern look and feel
Fancybox for user profile image
Color changes to intro + 500 error page
Scroll to top animation - intro page
User profile page - user not found error handling
Update links and about page
Merge pull request #15 from rice-apps/kevin-ui-improvements

Lots of UI updates + new pages