title: React-Native: Module AppRegistry is not a registered callable module
body: <p>I'm currently trying to get the <a href="https://github.com/mjohnston/react-native-webpack-server/tree/master/Examples/BabelES6" rel="noreferrer">ES6 react-native-webpack-server</a> running
  on an Android emulator. The difference is I've upgraded my <code>package.json</code> and <code>build.grade</code> to use react <code>0.18.0</code>, and am getting this error on boot. As far as I'm aware <code>AppRegistry</code> is imported correctly. Even if I were to comment out the code this error still comes up. This does work on iOS without issue. </p>
  
  <p>What am I doing wrong?</p>
  
  <p>EDIT: After trying other boilerplates that do support 0.18.0, I'm still coming across the same issue.</p>
  
  <p><a href="https://i.stack.imgur.com/HJqqQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HJqqQ.png" alt="enter image description here"></a></p>