title: Retrofit detected an unsupported OkHttp on the classpath error in OKHttp 2.0
body: <p>I am using <code>Retrofit-1.6.0</code> + <code>okhttp-2.0.0-RC1</code> in my project . 
  when i run the project i get the error.</p>
  
  <pre><code>java.lang.RuntimeException: Retrofit detected an unsupported OkHttp on the classpath.
  To use OkHttp with this version of Retrofit, you'll need:
  1. com.squareup.okhttp:okhttp:1.6.0 (or newer)
  2. com.squareup.okhttp:okhttp-urlconnection:1.6.0 (or newer)
  Note that OkHttp 2.0.0+ is supported!
  </code></pre>
  
  <p>Anybody knows how to fix this?</p>