Move to Kramdown and Rouge
Move to Kramdown and Rouge

Jekyll 3 and GitHub Pages now only support Kramdown as the Markdown
engine, and Rouge as the syntax highlighter.

Ref:
https://github.com/blog/2100-github-pages-now-faster-and-simpler-with-je
kyll-3-0

This commit updates Jekyll Now to support these changes, with just a
small _config.yml update.

alangshall/alangshall.github.io