Add information about CSS modules

Author: trodrigues

README.md

@@ -91,6 +91,8 @@ This is a fairly crazy idea for a number of reasons. It makes media queries more
 
 Once you've got a feel for how React works, you can look at alternate techniques. One popular one is [BEM](https://en.bem.info/). I recommend phasing out your CSS preprocessor, since React gives you a more powerful way to reuse styles (by reusing components) and your JavaScript bundler can generate more efficient stylesheets for you (I gave [a talk about this at OSCON](https://www.youtube.com/watch?v=VkTCL6Nqm6Y)). With that said, React, like any other JavaScript library, will work just fine with a CSS preprocessor.
 
+Alternatively, you can also use [CSS Modules](http://glenmaddern.com/articles/css-modules), more specifically [react-css-modules](https://github.com/gajus/react-css-modules). With CSS Modules you'll still write CSS (or SASS/LESS/Stylus), but you can manage and compose your CSS files like you'd do with inline styles in React. And you don't need to worry about managing your class names using methodologies like BEM, as this will be handled for you under the hood by the module system.
+
 ## Learning server rendering
 
 Server rendering is often called "universal" or "isomorphic" JS. It means that you can take your React components and render them to static HTML on the server. This improves initial startup performance because the user does not need to wait for JS to download in order to see the initial UI, and React can re-use the server-rendered HTML so it doesn't need to generate it client-side.