title: Add severals flashs using ExpressJS
body: <p>I'm using <code>request.flash</code> to send flashs to the users... But I'd like to send severals flahs to a view and <code>request.flash</code> seems to not offer this feature.</p>
  
  <p>My code :</p>
  
  <pre><code>request.flash('danger', 'some flash in a route');
  request.flash('danger', 'some flash in a route 2');
  </code></pre>
  
  <p>Result :</p>
  
  <pre><code>some flash in a route 2
  </code></pre>
  
  <p><strong>Edit #1 (server.js) :</strong></p>
  
  <pre><code>flash = require('connect-flash');
  app.use(flash());
  </code></pre>