Merge pull request #7 from alanjoyce/rev1-rebase

Template changes and adding a book
Adjust tutorials ing elements to include a  max height and max width of 100%
fix tutorial layout
prefix “sprite-“ on classes that come from dart-sprite.png
Fixing glyphicon classes for bootstrap3
Adding original tutorials style
fixed issue with overlapping divs
Fix updating url with hash
Also add hash for nav elements
fix css syntax bug
fix image scaling for dart-up-and-running
changing affix to affix-top for to work on mobile and desktop.
Adding shadow and spacing between books.
Adding glyphicon for video and slides
Fix spacing
Fix download buttons