Merge pull request facebook#1226 from LilyJ/master

included link to React devtools in tooling-integration. fixes facebook#791

docs/docs/08-tooling-integration.md

@@ -49,3 +49,7 @@ The open-source community has built tools that integrate JSX with several build
   * [web-mode.el](http://web-mode.org) is an autonomous emacs major mode that indents and highlights JSX
 * Linting provides accurate line numbers after compiling without sourcemaps.
 * Elements use standard scoping so linters can find usage of out-of-scope components.
+
+### Debugging
+
+[React Developer Tools](https://github.com/facebook/react-devtools) is a [Chrome extension](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en) that allows you to inspect the React component hierarchy in the Chrome Developer Tools.