title: Can't build after updating to Android Studio 2.3
body: <p>Two warnings show up when I try to build my project:</p>
  
  <blockquote>
    <p>Warning:Using incompatible plugins for the annotation processing: android-apt. This may result in an unexpected behavior.</p>
  </blockquote>
  
  <p>and also at the end of all the binding errors:</p>
  
  <blockquote>
    <p>Warning:The following options were not recognized by any processor: '[android.databinding.artifactType, android.databinding.printEncodedErrors, android.databinding.minApi, android.databinding.isTestVariant, android.databinding.enableDebugLogs, android.databinding.sdkDir, android.databinding.bindingBuildFolder, android.databinding.enableForTests, android.databinding.modulePackage, android.databinding.generationalFileOutDir, android.databinding.xmlOutDir]'</p>
  </blockquote>
  
  <p>I tried to enable annotation processors and removed all apt reference and changed this:</p>
  
  <blockquote>
    <p>apt 'com.jakewharton:butterknife-compiler:8.2.1'</p>
  </blockquote>
  
  <p>to this: </p>
  
  <blockquote>
    <p>annotationProcessor 'com.jakewharton:butterknife-compiler:8.2.1'</p>
  </blockquote>
  
  <p>but it didn't work.</p>