Update to latest version of Editor
Switch to FontAwesome icons
Include `marked` to get preview working
Update fullscreen API to latest spec

More info: http://www.sitepoint.com/use-html5-full-screen-api/
Update meta info
Populate statusbar numbers on load
Prevent textarea from growing infinitely wide, misc.
Preview pane tweaks
Re-add in commit ce538b7 tweaks
Merge pull request #13 from brockpetrie/master

Fix fullscreen, fix preview, etc.