move n2o javascript to separate folder

apps/web/priv/static/app/index.htm

@@ -13,8 +13,9 @@
 
     <svg id="Refined" style="top:0; left:0; height:100%; width:100%;"></svg>
 
-    <script src="js/bert.js"></script>
-    <script src="js/bullet.js"></script>
+    <script src="js/n2o/bert.js"></script>
+    <script src="js/n2o/bullet.js"></script>
+
     <script src="js/selector.js"></script>
     <script src="js/controller.js"></script>
     <script src="js/dragndrop.js"></script>