Add README badges and LICENSE (#58)

Add README badges and LICENSE

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 react-native-community
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.% 

README.md

@@ -1,6 +1,9 @@
 # @react-native-community/push-notification-ios
 
-[![Lean Core Extracted](https://img.shields.io/badge/Lean%20Core-Extracted-brightgreen.svg)][lean-core-issue]
+[![Build Status][build-badge]][build]
+[![Version][version-badge]][package]
+[![MIT License][license-badge]][license]
+[![Lean Core Badge][lean-core-badge]][lean-core-issue]
 
 React Native Push Notification API for iOS.
 
@@ -88,4 +91,11 @@ to:
 import PushNotificationIOS from "@react-native-community/push-notification-ios";
 ```
 
-[lean-core-issue]:https://github.com/facebook/react-native/issues/23313
+[build-badge]: https://img.shields.io/circleci/project/github/react-native-community/react-native-push-notification-ios/master.svg?style=flat-square
+[build]: https://circleci.com/gh/react-native-community/react-native-push-notification-ios
+[version-badge]: https://img.shields.io/npm/v/@react-native-community/push-notification-ios.svg?style=flat-square
+[package]: https://www.npmjs.com/package/@react-native-community/push-notification-ios
+[license-badge]: https://img.shields.io/npm/l/@react-native-community/push-notification-ios.svg?style=flat-square
+[license]: https://opensource.org/licenses/MIT
+[lean-core-badge]: https://img.shields.io/badge/Lean%20Core-Extracted-brightgreen.svg?style=flat-square
+[lean-core-issue]: https://github.com/facebook/react-native/issues/23313