title: React-navigation error when trying to set up after installing - Element type is invalid
body: <p>I am new to react-native was fiddling around and came across need of navigation. However, after following directions on reactnavigation.org my emulator is spewing out a nonsensical error to me. Google had no help sadly this time.</p>
  <blockquote>
  <p>Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in.</p>
  <p>Check the render method of <code>AwakeInDevApp</code>.</p>
  </blockquote>
  <p>Code is most simplistic example they have:</p>
  <pre><code>import React from 'react';
  import {
    AppRegistry,
    Text,
  } from 'react-native';
  import { StackNavigator } from 'react-navigation';
  
  class HomeScreen extends React.Component {
    static navigationOptions = {
      title: 'Welcome',
    };
    render() {
      return &lt;Text&gt;Hello, Navigation!&lt;/Text&gt;;
    }
  }
  
  const EProj = StackNavigator({
    Home: { screen: HomeScreen },
  });
  
  AppRegistry.registerComponent('EProj', () =&gt; EProj);
  </code></pre>
  <p>Dependencies:</p>
  <pre><code>  &quot;dependencies&quot;: {
      &quot;expo&quot;: &quot;^20.0.0&quot;,
      &quot;react&quot;: &quot;16.0.0-alpha.12&quot;,
      &quot;react-native&quot;: &quot;^0.47.0&quot;,
      &quot;react-navigation&quot;: &quot;^1.0.0-beta.11&quot;
    }
  </code></pre>