Issue 51 - added 'entry' to the top of the page, plus updated entry.php

entry.php

  * install.php
  * index.php
  * login.php
+ * update.php
+ * rss.php
  * admin/index.php
  * admin/close.php
  * admin/ajax.php

rss.php

 <?php
-if(!defined('entry') || !entry) die('Not a valid page'); 
+if(!defined('entry')) define('entry',true); 
 /* ===========================
 
   gelato CMS - A PHP based tumblelog CMS

update.php

 <?php
-if(!defined('entry') || !entry) die('Not a valid page'); 
+if(!defined('entry')) define('entry',true);  
 /* ===========================
 
   gelato CMS - A PHP based tumblelog CMS