Merge pull request #98 from bluenaux/master

 In Chrome,check fullState function is document.webkitIsFullScreen

Author: lepture

src/intro.js

@@ -94,7 +94,7 @@ function toggleFullScreen(editor) {
 
   // https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode
   var doc = document;
-  var isFull = doc.fullScreen || doc.mozFullScreen || doc.webkitFullScreen;
+  var isFull = doc.fullScreen || doc.mozFullScreen || doc.webkitIsFullScreen;
   var request = function() {
     if (el.requestFullScreen) {
       el.requestFullScreen();