title: After convert my code to swift 3 Twitter not get the users profile image
body: <p>I'm using <code>FHSTwitter Engine</code>. In that, I can get <code>Username</code> by using <code>FHSTwitterEngine.shared().authenticatedUsername</code> this. But 
  <code>FHSTwitterEngine.shared().getProfileImageURLString(forUsername: username as String, andSize: FHSTwitterEngineImageSizeOriginal</code> in this I got error like <code>Error Domain=FHSErrorDomain Code=204 "The request did not return any content.</code> How to I get profile image? 
  But It's work fine for swift 2.0. How to solve this Issue.</p>