This is a sandbox repository. Things can be created and destroyed and played with at random here.
Don't be shy; have fun. To get started: ask for edit access by opening an issue!
The gh-pages branch contains files that were copied from an instructional materials template.
The history of commits there is expansive.
Additionally gh-pages is a special branch name in GitHub; this is a branch name that is commonly used to create "GitHub Pages" websites.