CoffeeScript talk: slides!

As shown at QCon NY 2013.
CoffeeScript talk: add slides+notes viewer page.
CoffeeScript talk: full transcript/notes!
CoffeeScript talk: open all links in new window.

Should do this for all future talks too.
CoffeeScript talk: title slide workaround for Firefox.
Slides+notes viewer: scroll to top on slide changes.
Merge branch 'feature/coffeescript-talk' into develop