MAPG-87 use HTML5 semantic elements, new styles, new footer

views/login/signup_success.php

@@ -1,9 +1,8 @@
 <?php require ROOT . '/views/templates/main_header.php'; ?>
 <?php require ROOT . '/views/templates/header.php'; ?>
-<div class="main">
     <h2>Sign up</h2>
     <div class="box">
         <p class="justify">Sign up was successful. Please check your email and click on the activation link to activate your account!</p>
     </div>
-</div>
+<?php require ROOT . '/views/templates/footer.php'; ?>
 <?php require ROOT . '/views/templates/main_footer.php'; ?>