Fixed footer

Footer will now stick to the bottom of the page if the content doesn't fill the view height.

Author: weerox

css/tutorial.css

@@ -53,7 +53,6 @@ header h2 {
   padding-left: 1em;
   margin-top: 0.3em;
   margin-bottom: 0.5em;
-  padding-bottom: 0.5em;
   text-align: center;
 }