Require index-only JS in index.js

app/assets/javascripts/application.js

@@ -9,10 +9,7 @@
 //= require globals
 //= require params
 //= require piwik
-//= require browse
-//= require export
 //= require map
-//= require key
 //= require menu
 //= require sidebar
 //= require richtext

app/assets/javascripts/index.js

@@ -1,3 +1,7 @@
+//= require index/browse
+//= require index/export
+//= require index/key
+
 $(document).ready(function () {
   var marker;
   var params = OSM.mapParams();