Merge pull request #625 from Mouseion/patch-gitbook

Add Git Workflows

free-programming-books.md

@@ -752,6 +752,7 @@
 * [Git Reference](http://www.gitref.org)
 * [Version Control by Example (Mercurial, Subversion, Verasity)](http://www.ericsink.com/vcbe/)
 * [Git Succinctly, Syncfusion](http://www.syncfusion.com/resources/techportal/ebooks/git) (PDF, Kindle) *(Just fill the fields with any values)*
+* [Git Workflows](http://documentup.com/skwp/git-workflows-book)
 * [Think Like (a) Git: A Guide for the Perplexed](http://think-like-a-git.net)
 * [Git In The Trenches](http://cbx33.github.io/gitt/index.html)
 * [Conversational Git](http://blog.anvard.org/conversational-git/)