added them selection in syntax. closes #2

code comes from the wiki page. unknown author

renderer.php

@@ -45,7 +45,8 @@ class renderer_plugin_s5 extends Doku_Renderer_xhtml {
         );
         p_set_metadata($ID,array('format' => array('s5' => $headers) ));
         $this->base = DOKU_BASE.'lib/plugins/s5/ui/';
-        $this->tpl  = $this->getConf('template');
+        $this->tpl  = isset($_GET['s5theme'])?$_GET['s5theme']:$this->getConf('template');
+        $this->tpl = preg_replace('/[^a-z0-9_-]+/', '', $this->tpl); // clean user provided path
     }
 
     /**