Add module authorization for news

Add files and links to announcement and news
Change page.children into page.ordered_and_visible_children in parser_commom

lib/parsers/parser_common.rb

@@ -3,7 +3,7 @@ module ParserCommon
 
   def menu_level(page, current, menu, edit = false)
     res = ''
-    if page.children.size > 0
+    if page.ordered_and_visible_children.size > 0
       res << "<ul class='"
       res << menu.values["class_#{current}"] rescue nil
       res << "'>"