title: Getting warnings and errors after enabling proguard
body: <p>I enabled proguard for my release build and when I ran the project, I get <a href="http://paste.ubuntu.com/13471683/" rel="nofollow">these warnings and errors</a>. Here is my <code>buildTypes</code> block:</p>
  
  <pre><code>buildTypes {
          release {
              minifyEnabled true
              //shrinkResources true
              signingConfig signingConfigs.myConfig
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  </code></pre>
  
  <p>The build message was too long to post here so have put external link.
  What is the reason for these warnings? Is there something I have done wrong? How can I fix this?</p>