Summary:
Compared to the `<MapView>` that comes with React Native, [react-native-maps](https://github.com/airbnb/react-native-maps) work on Android and is more feature complete. It is actively maintained and used extensively (9.2k installs / month, see [JS.Coach](https://js.coach/react-native/react-native-maps?search=react-native-maps)).
We think now is a good time to switch to react-native-maps in your applications and make `react-native-maps` the official `<MapView>` implementation for React Native.
We are going to release the deprecated `<MapView>` as a separate npm module so you can migrate to `react-native-maps` at your own pace.
**Test Plan**
Checked the docs render correctly on the website:
```
cd website
npm install
npm start
```
<img width="696" alt="screenshot 2016-11-01 20 17 31" src="https://cloud.githubusercontent.com/assets/346214/19905831/480074b8-a070-11e6-8779-8e12343c2883.png">
Warning is shown:
<img width="423" alt="screenshot 2016-11-01 20 39 21" src="https://cloud.githu
Closes https://github.com/facebook/react-native/pull/10500
Differential Revision: D4119602
Pulled By: mkonicek
fbshipit-source-id: 86780a98bf999e6047565ab66a5ebbd15e499a46