title: Success message in module front controller
body: <p>I'm actually using the <a href="https://github.com/iwanwan/Prestashop-1.5/blob/master/classes/Tools.php" rel="nofollow">Tools class</a> in Prestashop 1.5 that allows me to display error messages to the front-end:</p>
  
  <pre><code>$this-&gt;errors[] = Tools::displayError( 'Fatal error!' );
  </code></pre>
  
  <p>Is there any function to display <strong>success</strong> messages the same way?
  It seems that we can't use the <code>l()</code> function inside of an extended <code>ModuleFrontController()</code></p>
  
  <p>Any advice would be greatly appreciated.</p>