Tutorial pull request

Thanks for the tutorial. However, I wasn't able to commit the changes into the local repository using GitHub for Windows. Everything else worked fine. I always got an error, but the dialogue box let me open powershell and from there the command "git commit" worked. (I'm running WinXP and have admin privileges.) Anyway, thanks for providing this tutorial. It helps a lot as I'm just getting started with git/version control. :)