Add React Enlightenment and React In-depth (#2081)

javascript-frameworks-resources.md

@@ -122,6 +122,8 @@
 * [Hacking with React](http://www.hackingwithreact.com)
 * [Intro to the React Framework](http://code.tutsplus.com/tutorials/intro-to-the-react-framework--net-35660)
 * [Learning React.js: Getting Started and Concepts](https://scotch.io/tutorials/learning-react-getting-started-and-concepts)
+* [React Enlightenment](https://www.gitbook.com/book/frontendmasters/react-enlightenment/details)
+* [React In-depth: An exploration of UI development](https://www.gitbook.com/book/developmentarc/react-indepth/details)
 * [React Primer Draft](https://github.com/mikechau/react-primer-draft)
 * [React Tutorial](https://facebook.github.io/react/docs/tutorial.html)
 * React Tutorial by Josh Finnie