MINOR: moved director route to new config API

_config.php

@@ -1,12 +1,8 @@
 <?php
 
-// adds a rule to make www.site.com/sitemap.xml work
-Director::addRules(10, array(
-	'sitemap.xml' => 'GoogleSitemap',
-));
-
 // add the extension to pages
-if (class_exists('SiteTree')) Object::add_extension('SiteTree', 'GoogleSitemapSiteTreeDecorator');
+if (class_exists('SiteTree')) 
+	Object::add_extension('SiteTree', 'GoogleSitemapSiteTreeDecorator');
 
 // if you need to add this to DataObjects include the following in
 // your own _config:

_config/routes.yml

@@ -0,0 +1,6 @@
+---
+Name: googlesitemaproutes
+---
+Director:
+  rules:
+    'sitemap.xml': 'GoogleSitemap'