title: Retrofit cannot find symbol
body: <blockquote>
  <pre><code> ckage com.netvariant.helloworld;
    import retrofit.Callback;
    import retrofit.http.GET;
    import retrofit.http.Query;
    import retrofit.Call;
   public interface StackOverflowAPI {
  @GET("/2.2/questions?order=desc&amp;sort=creation&amp;site=stackoverflow")
  Call&lt;StackOverflowQuestions&gt; loadQuestions(@Query("tagged") String tags);}
  </code></pre>
  </blockquote>
  
  <p>I have included in my gradle file
  compile 'com.squareup.retrofit2:converter-gson:2.0.2'
      compile 'com.squareup.retrofit2:retrofit:2.0.2'</p>
  
  <p>Whats the issue?</p>