Update README.md (#698)

* Update README.md

* Update README.md

* Update README.md

* Add javascript tag

* Update README.md

README.md

@@ -37,7 +37,7 @@ class SimpleMap extends Component {
           <AnyReactComponent
             lat={59.955413}
             lng={30.337844}
-            text={'Kreyser Avrora'}
+            text="My Marker"
           />
         </GoogleMapReact>
       </div>
@@ -83,6 +83,38 @@ It renders components on the map before (and even without) the Google Maps API l
 
 There is no need to place a `<script src=` tag at top of page. The Google Maps API loads upon the first usage of the `GoogleMapReact` component.
 
+### Anything you can do with Google Maps, you can do with Google Map React
+
+You can access to Google Maps `map` and `maps` objects by using `onGoogleApiLoaded`, in this case you will need to set `yesIWantToUseGoogleMapApiInternals` to `true`
+
+```javascript
+...
+
+const handleApiLoaded = (map, maps) => {
+  // use map and maps objects
+};
+
+...
+
+<GoogleMapReact
+  bootstrapURLKeys={{ key: /* YOUR KEY HERE */ }}
+  defaultCenter={this.props.center}
+  defaultZoom={this.props.zoom}
+  yesIWantToUseGoogleMapApiInternals
+  onGoogleApiLoaded={({ map, maps }) => handleApiLoaded(map, maps)}
+>
+  <AnyReactComponent
+    lat={59.955413}
+    lng={30.337844}
+    text="My Marker"
+  />
+</GoogleMapReact>
+```
+
+PST: Remember to set `yesIWantToUseGoogleMapApiInternals` to true.
+
+[Example here](https://github.com/google-map-react/google-map-react-examples/blob/master/src/examples/Main.js#L69)
+
 ### Internal Hover Algorithm
 
 Now every object on the map can be hovered (however, you can still use css hover selectors if you want). If you try zooming out here [example](http://google-map-react.github.io/google-map-react/map/main), you will still be able to hover on almost every map marker.