docs(readme): add bithound badge, @kentcdodds egghead tutorial

Author: jimthedev

README.md

@@ -1,7 +1,7 @@
 ### Commitizen for contributors
 When you commit with Commitizen, you'll be prompted to fill out any required commit fields at commit time. No more waiting until later for a git commit hook to run and reject your commit (though [that](https://github.com/kentcdodds/validate-commit-msg) can still be helpful). No more digging through CONTRIBUTING.md to find what the preferred format is. Get instant feedback on your commit message formatting and be prompted for required fields.
 
-[![travis.ci](https://img.shields.io/travis/commitizen/cz-cli.svg?style=flat-square)](https://travis-ci.org/commitizen/cz-cli) [![codecov.io](https://img.shields.io/codecov/c/github/commitizen/cz-cli.svg?style=flat-square)](https://codecov.io/github/commitizen/cz-cli?branch=master) [![npm monthly downloads](https://img.shields.io/npm/dm/commitizen.svg?style=flat-square)](https://www.npmjs.com/package/commitizen) [![current version](https://img.shields.io/npm/v/commitizen.svg?style=flat-square)](https://www.npmjs.com/package/commitizen)
+[![travis.ci](https://img.shields.io/travis/commitizen/cz-cli.svg?style=flat-square)](https://travis-ci.org/commitizen/cz-cli) [![codecov.io](https://img.shields.io/codecov/c/github/commitizen/cz-cli.svg?style=flat-square)](https://codecov.io/github/commitizen/cz-cli?branch=master) [![npm monthly downloads](https://img.shields.io/npm/dm/commitizen.svg?style=flat-square)](https://www.npmjs.com/package/commitizen) [![current version](https://img.shields.io/npm/v/commitizen.svg?style=flat-square)](https://www.npmjs.com/package/commitizen) [![bitHound Score](https://www.bithound.io/github/commitizen/cz-cli/badges/score.svg)](https://www.bithound.io/github/commitizen/cz-cli)
 
 #### Installing the command line tool
 Installation is as simple as running the following command (add sudo if on OSX/Linux):
@@ -68,6 +68,11 @@ Your badge will look like this:
 
 It may also make sense to change your README.md or CONTRIBUTING.md to include or link to the Commitizen project so that your new contributors may learn more about installing and using Commitizen.
 
+
+#### Go further
+
+Commitizen is great on its own, but it shines when you use it with some other amazing open source tools. Kent C. Dodds shows you how to accomplish this in his Egghead.io series, [How to write an open source javascript library](https://egghead.io/series/how-to-write-an-open-source-javascript-library). Many of the concepts can be applied to non-javascript projects as well.
+
 ### Adapters
 
 We know that every project and build process has different requirements so we've tried to keep Commitizen open for extension. You can do this by choosing from any of the pre-build adapters or even by building your own. Here are some of the great adapters available to you: