Add react-cosmos (enaqx#626)

Author: bbirand

README.md

@@ -692,6 +692,7 @@ A collection of awesome things regarding React ecosystem.
 * [generator-react-gulp-browserify - Yeoman generator for React](https://github.com/randylien/generator-react-gulp-browserify)
 * [generator-reactapp - Yeoman generator for react app with redux, webpack, gulp and restful.js etc.](https://github.com/Jackong/generator-reactapp)
 * [static-site-generator-webpack-plugin - Prerender isomorphic JavaScript apps to static HTML](https://github.com/markdalgleish/static-site-generator-webpack-plugin)
+* [react-cosmos - DX tool for designing reusable React components](https://github.com/react-cosmos/react-cosmos)
 * [React Storybook - UI Component Dev Environment for React](https://github.com/kadirahq/react-storybook)
 * [generator-sui-react - A yeoman generator for Schibsted User Interface (SUI) ReactJS components](https://github.com/SUI-Components/generator-sui-react)
 * [Racket - A yeoman generator for creating a universal react/redux web application](https://github.com/mohebifar/racket)