title: Dialogflow with actions-on-google fulfillment: Console can't display multiple reponses (How do I send text response?)
body: <p>I'm using Dialogflow with a fulfillment backend based on <code>actions-on-google</code>. Adding Responses using <code>conv.ask('text')</code> or <code>conv.add('text')</code> seems to work. But when I add multiple responses using <code>conv.add()</code>, dialogflow is no longer able to display the responses.</p>
  
  <p>This seems to be due to <code>actions-on-google</code> returning <code>simpleResponse</code> rather than the required <code>text</code> Response. I have no idea what happens behind the scenes in dialogflow, but it seems to convert single responses into the required <code>text</code> format, but fails to do so for multiple responses. Nothing as such is documented anywhere so I'm just guessing.</p>
  
  <p>Is there a way to send <code>text</code> Responses using the <code>conv</code> object directly? Or is something else the problem? Documentation on Google's side would really help.</p>