Add link to GitHub

[FireIsGood]

There's a link to this repo in the course but otherwise the only listed way to contact is through a form that I think users would more be associating with course feedback. A link in the footer or about page would probably help this.

Oh and as a user story:

As a developer I want to be able to click a link to view the GitHub repo so I can create issues for problems I found or suggestions on improvements to the code as opposed to the research methodology.

Negotiable: Does not mention the exact spot the link will be located.
Valuable: This software is open source and there is a link on the course page that specifically links here to report issues.
Small: I could do this within 5 minutes if I had the setup for it.