Git.Tutorial is out of date

[mchaver]

It looks like this is out of date. Some of the functions used in the tutorial don't seem to exist.

[mchaver]

I just realized this has more up to date documentation:
https://github.com/jwiegley/gitlib/blob/master/gitlib/README.md

If you don't want to update Git.Tutorial, may I suggest you delete in and then in hackage point to the readme so new users know where to go?