GitHub Pages compatibility

[jayvdb]

The orgs on https://github.com/gsocindonesia/gsoc-orgs/ are not rendered because GitHub Pages doesnt use custom Jekyll plugins.

jekyll/jekyll#5207 is the upstream jekyll enhancement request which could resolve this.

Also a build process on Travis CI which pushes the generated html to a GitHub branch would also work. (the https://github.com/coala/gci-leaders repo can be used as an example)

Note: Replacing the jekyll plugin with complicated liquid templates is not an valid approach.