Instructor notes for teaching git via collaboration on GitHub

The focus of the lesson is to have students contribute to a repo on GitHub in
which we are building up a list of the things they are most interested in
learning at the boot camp. Requires everyone have a good internet connection
and that at least some of the participants sign up for GitHub.

Everything is in the [instructor_notes.md](https://github.com/jiffyclub/boot-camps/blob/git-github/version-control/git/git-and-github/instructor_notes.md) file.

([Link to branch](https://github.com/jiffyclub/boot-camps/tree/git-github).)