Added shields (#526)

- NPM (Version / Downloads)
- Build Status
- Discord

README.md

@@ -1,5 +1,11 @@
 # React Native Navigation
 
+[![NPM Version](https://img.shields.io/npm/v/react-native-navigation.svg?style=flat)](https://www.npmjs.com/package/react-native-navigation)
+[![NPM Downloads](https://img.shields.io/npm/dm/react-native-navigation.svg?style=flat)](https://www.npmjs.com/package/react-native-navigation)
+[![Build Status](https://travis-ci.org/wix/react-native-navigation.svg?branch=master)](https://travis-ci.org/apollostack/graphql-tools)
+[![Join us on Discord](https://img.shields.io/badge/discord-react--native--navigation-738bd7.svg?style=flat)](https://discord.gg/DhkZjq2)
+
+
 App-wide support for 100% native navigation with an easy cross-platform interface. For iOS, this package is a wrapper around [react-native-controllers](https://github.com/wix/react-native-controllers), but provides a simplified more abstract API over it. This abstract API will be unified with the Android solution which is currently work in progress. It also fully supports redux if you use it.
 
 <img src="https://github.com/wix/react-native/blob/master/assets/themes/bootstrap-3/images/demo.gif?raw=true" width="240">
@@ -7,11 +13,11 @@ App-wide support for 100% native navigation with an easy cross-platform interfac
 ----
 
 > ### Important
-> We are currently working hard on redesigning and refactoring this project with high quality and robustness in mind. As a result, issues and pull requests will take more time to process. 
+> We are currently working hard on redesigning and refactoring this project with high quality and robustness in mind. As a result, issues and pull requests will take more time to process.
 
 > To avoid any confusion and breaking existing projects, all continuous development is published under the npm tag `next`, with version `2.0.0-experimental.x`. Once stable, we will publish it as `2.0.0`. **This version supports react-native `0.37.0`**.
 
-> The last stable version is `1.30.x` with npm tag `latest`. **This version supports react-native `0.25.1`**. It's installation instructions are [here](https://github.com/wix/react-native-navigation/blob/v1.x.x/README.md#installation---ios). 
+> The last stable version is `1.30.x` with npm tag `latest`. **This version supports react-native `0.25.1`**. It's installation instructions are [here](https://github.com/wix/react-native-navigation/blob/v1.x.x/README.md#installation---ios).
 
 >If you don't want your code to break on a daily basis and don't need the new features ASAP please use the `latest` version or just specify a specific version number.