title: NoSuchMethodError if i am using okhttp 2.0 and the latest retrofit?
body: <p>Could not find method com.squareup.okhttp.OkHttpClient.open, referenced from method retrofit.client.OkClient.openConnection.</p>
  
  <p>below is my gradle config</p>
  
  <pre><code>compile 'com.squareup.okhttp:okhttp:+'
  compile 'com.squareup.okhttp:okhttp-urlconnection:+'
  compile 'com.squareup.retrofit:retrofit:+'
  </code></pre>