Exclude image files from navigation list

lib/dir_tree.rb

@@ -52,7 +52,7 @@ def directory_hash(path, name=nil)
   data = {:data => (name || path)}
   data[:children] = children = []
   Dir.foreach(path) do |entry|
-    next if (entry == '..' || entry == '.' || entry == '.git' || entry.include?('index') || entry.include?('.sh') || entry.include?('.swp') )
+    next if (entry == '..' || entry == '.' || entry == '.git' || entry.include?('index') || entry.include?('.sh') || entry.include?('.swp') || entry.include?('.png') || entry.include?('.jpg') || entry.include?('.jpeg') )
     full_path = File.join(path, entry)
     if File.directory?(full_path)
       children << directory_hash(full_path, entry)