title: Can't add marker with google-maps-react
body: <pre><code>import {Map, GoogleApiWrapper} from 'google-maps-react'
  
  
  var React = require('react')
  
  class GoogleMapContainer extends React.Component {
      render() {
          return(
              &lt;Map google={this.props.google}
                  style={{width: '100%', height: '100%', position: 'relative'}}
                  className={'map'}
                  zoom={14}&gt;
                &lt;Marker
                  title={'The marker`s title will appear as a tooltip.'}
                  name={'SOMA'}
                  position={{lat: 37.778519, lng: -122.405640}} /&gt;
                &lt;Marker
                  name={'Dolores park'}
                  position={{lat: 37.759703, lng: -122.428093}} /&gt;
                \\
              &lt;/Map&gt;
  
          )
      }
  }
  
  export default GoogleApiWrapper({
    apiKey: 'AIzaSyDq-nhDEOWaOzLfFAr9Lx4dlvEBIpHMxCk'
  })(GoogleMapContainer)
  </code></pre>
  
  <p>i have this code that gives me an error in the browser console</p>
  
  <pre><code>ReferenceError: Marker is not defined
  </code></pre>
  
  <p>but in the documentation of the package they never import Marker
  <a href="https://github.com/fullstackreact/google-maps-react" rel="nofollow noreferrer">https://github.com/fullstackreact/google-maps-react</a></p>
  
  <p>i can't discover what is happening</p>