This is easy-jekyll-starter, which is essentially the base Jekyll theme (minima), but ejected out of its gem + a Travis CI template.

You can find the source code for this repository at GitHub: malsf21 / easy-jekyll-starter

You can find out more info about customizing your Jekyll theme, as well as basic Jekyll usage documentation at jekyllrb.com

You can find the source code for Minima at GitHub: jekyll / minima

You can find the source code for Jekyll at GitHub: jekyll / jekyll