Support react-native > 0.40 (#437)

* Support react-native > 0.40

* Bumping major version. Breaking change.

* Upgrade example project from 0.33 => 0.40.

example/index.ios.js

@@ -33,6 +33,7 @@ class VideoPlayer extends Component {
   };
 
   onLoad(data) {
+    console.log('On load fired!');
     this.setState({duration: data.duration});
   }