Objectify locale negotiator and template files, add documentation

404.php

@@ -1,12 +1,11 @@
 <?php 
 require("config.php");
-require("header.php");
-require("footer.php");
-render_header("Page not found");
+require("template.php");
+Template::render_header("Page not found");
 ?>
   <div class="text-center">
     <h1><?php echo _("Page Not Found");?></h1>
     <p><?php echo _("Sorry, but the page you were trying to view does not exist.");?></p>
   </div>
 <?php 
-render_footer();
+Template::render_footer();