Add _resources to the list of files to be ignored

using DocumentationService::set_ignored_files() in _config

_config.php

@@ -21,4 +21,10 @@ if(!defined('DOCSVIEWER_DIR')) {
 // define your own rule in your mysite/_config.php
 Director::addRules(100, array(
 	'dev/docs' => 'DocumentationViewer'
-));
+));
+
+// define filetypes to ignore
+DocumentationService::set_ignored_files(array(
+	'.', '..', '.DS_Store',
+	'.svn', '.git', 'assets', 'themes', '_images', '_resources'
+));