title: Pow Powder Weird Output Message
body: <p>When I do <code>powder up</code> I get</p>
  
  <pre><code>Expected string default value for '--browser'; got false (boolean)
  Pow has been started.
  </code></pre>
  
  <p>What does this mean? I'm having some configuration issues and I've never seen this before. (I'm talking about the first line obviously)</p>