Added create-react-native-app information to README (#979)

Author: Zakeelm

README.md

@@ -101,6 +101,7 @@ As with all other React Native plugins, the integration experience is different
 
 If you want to see how other projects have integrated with CodePush, you can check out the excellent [example apps](#example-apps--starters) provided by the community. Additionally, if you'd like to quickly familiarize yourself with CodePush + React Native, you can check out the awesome getting started videos produced by [Bilal Budhani](https://www.youtube.com/watch?v=uN0FRWk-YW8&feature=youtu.be) and/or [Deepak Sisodiya ](https://www.youtube.com/watch?v=f6I9y7V-Ibk).
 
+*NOTE: This guide assumes you have used the `react-native init` command to initialize your React Native project. As of March 2017, the command `create-react-native-app` can also be used to initialize a React Native project. If using this command, please run `npm run eject` in your project's home directory to get a project very similar to what `react-native init` would have created.*
 
 Then continue with installing the native module
   * [iOS Setup](docs/setup-ios.md)