message: Added NavigationMotion to index
diff: import React from 'react';
  import {render} from 'react-native';
  +import {NavigationHandler} from 'navigation-react';
  +import {NavigationMotion} from 'navigation-react-mobile';
  +import createStateNavigator from './createStateNavigator';
  -render(<div>Hello World</div>, document.getElementById('content'))
  \ No newline at end of file
  +const stateNavigator = createStateNavigator();
  +
  +stateNavigator.start();
  +
  +render(
  + <NavigationHandler stateNavigator={stateNavigator}>
  + <NavigationMotion
  + unmountedStyle={{opacity: 0}}
  + mountedStyle={{opacity: 1}}
  + crumbStyle={{opacity: 0}}>
  + {({opacity}, scene, key) => (
  + <div key={key}
  + style={{opacity}}>
  + {scene}
  + </div>
  + )}
  + </NavigationMotion>
  + </NavigationHandler>,
  + document.getElementById('content')
  +)
  