Revert "Tried some more settings in _config.yml to get the site working on GitHub"

This reverts commit 04c8d509ffbbc3d89db25b31dce0018099324c2f.
Revert "Revert "Tried some more settings in _config.yml to get the site working on GitHub""

This reverts commit fcaf27344983c6e79e5ff992aefe53fac405903e.
Revert "Create gh-pages branch via GitHub"

This reverts commit d52cb3db7368f778d949f9f8b8f905cb83787a87.