Update jquery to v1.11.0.

Also use the one from Google's CDN.

docs/_includes/header.html

@@ -21,7 +21,7 @@
 
 <link rel="apple-touch-icon-precomposed" sizes="114x114" href="../assets/img/apple-touch-icon-114x114.png">
 
-<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
+<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
 <script src="../dist/ratchet.js"></script>
 <script src="../assets/js/docs.js"></script>
 <script src="../assets/js/fingerblast.js"></script>