title: How to run Play Framework 2.2.0 with -feature option
body: <p>Seeing this in my console after running <code>play -&gt; run</code>:</p>
  
  <pre><code>[warn] there were 1 feature warning(s); re-run with -feature for details
  [warn] one warning found
  </code></pre>
  
  <p>Where is this enabled? Would like to see what the warning is, but running <code>play -feature</code> or <code>run -feature</code> doesn't seem to do the trick.</p>
  
  <p>I'm running Play Framework 2.2.0-scala</p>