Adding JQuery for scroll-wheel binding.

Added JQuery from Google's cached CDN version. Can be minified and added in if desired, however this is usually suggested against. Again a part of msurguy#2

index.html

@@ -5,7 +5,7 @@
     <title>Delaunay triangle pattern maker</title>
     <meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
     <link rel="stylesheet" href="css/style.css">
-
+    <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
     <script>
       (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
       (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),