Send Ina Github tutorial

[brymz]

Some choices. I'll check in with the lab to see what was most helpful to them.

• https://help.github.com/en/github/using-git/adding-a-remote
• https://help.github.com/en/github/using-git/pushing-commits-to-a-remote-repository
• https://guides.github.com/activities/hello-world/

[brymz]

Hope the links helped. We also put a tutorial up on our lab wiki: https://github.com/TREC-Agroecology/lab-wiki/wiki/GitHub-Workflow