Revert "Fix for jekyll 3.x"
Revert "Fix for jekyll 3.x"

This reverts commit 3425f417cf6e788b22146b0341c4d4eea7f03ef8.

TUDelft-IN4303/TUDelft-IN4303.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303/TUDelft-IN4303.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303/TUDelft-IN4303.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io