GitHub and MadCap Contributor

[BeckyDoyle]

We are looking to use GitHub as a means of maintaining the files we send out for group reviews in Madcap Contributor. One of my co-workers found this third-party plug-in that should work for this, but I really don't understand much about why the plug-in is needed and what it does...?
http://www.pushok.com/software/git.html

Anyone have experience in this and able to shed some light on the situation for me?

-Becky