title: Handling error response in Retrofit android
body: <p>I am using Retrofit as my networking library. Everything is running smoothly. 
  I just have a new requirement, Server send me a <strong>response</strong> in Json, in case of <strong>failure</strong>.
  I want to grab that whole response, right now <strong>RetrofitError</strong> in failure callback, doesn't give my server response in any of the <strong>RetrofitError</strong> attributes. </p>
  
  <p>Any Kind of help would be appreciated. Thanks.</p>