Downgrade to jQuery 2, with note as to why.

index.html

@@ -9,7 +9,8 @@
     <link rel="stylesheet" href="css/style.css">
     <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
 
-    <script type="text/javascript" src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
+    <!-- TODO: Waiting for https://github.com/Dogfalo/materialize/pull/3570 to become part of Materialize, before we can upgrade to jQuery 3 -->
+    <script type="text/javascript" src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
     <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
     <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/prism/0.0.1/prism.min.js"></script>