GitHub Pages is great for building a personal or project website. It'll default to http://username.github.io, or you can even use your own custom domain name from services like Namecheap, which I will write about in another post soon.
So you set up your GitHub Page for yourself or project, but what if you want to show off some of your other projects you are working on. You can go the poor man's route, and simply just copy everything from another repository into a folder in your username.github.io repository, commit and push the changes to GitHub, and you'll be able to navigate to http://username.github.io/project.
But this comes with some seriously inconvienent and non-conventional drawbacks, such as duplication of code across repositories and manually copy/paste-ing everytime changes are made to update your hosted codebase. Good luck maintaining that.
The other