title: Unity: Use HTTP PUT in Unity3D
body: <p>I'm quite new to Unity and facing some problems about RESTFul in Unity.
  I want to update some data on the server by using HTTP PUT, but as what I received when search the web, the WWWW class in Unity doesn't support HTTP PUT. I also tried some HttpWebRequest example related to HTTP PUT but always received error code 400: Bad Request.</p>
  
  <p>How can I solve this problem?
  Do I have to list out all the key-value pairs when updating or just need to list the pairs I want to change the value ?</p>