title: python hug api return custom http code
body: <p>After looking for it for quite a while and asking on:
  <a href="https://gitter.im/timothycrosley/hug" rel="noreferrer">https://gitter.im/timothycrosley/hug</a>
  I'm unable to find a solution.</p>
  
  <p>what I'm looking for is a way to return a custom http code, lets say 204 in case a condition is met in the <code>get</code> end point.
  the explanation for routing problems is <a href="http://www.hug.rest/website/learn/routing" rel="noreferrer">here</a></p>
  
  <p>but I can't seem to find a way to return any other codes other than 200 with a null response</p>