More work with titles & descriptions

imports/ui/pages/NotFound/NotFound.js

@@ -1,9 +1,13 @@
 import React from 'react';
 import { Alert } from 'react-bootstrap';
 import { translate, Trans } from 'react-i18next';
+import { Helmet } from 'react-helmet';
 
 const NotFound = () => (
   <div className="NotFound">
+    <Helmet>
+      <title>This page doesn't exist"</title>
+    </Helmet>
     <Alert bsStyle="danger">
       <p>
         <Trans i18nKey="not-found">Upppps: Esta página no existe</Trans>