Table CSS env:lisp-system

Hi.

A tiny contribution for starters. I found the table not very readable and Markdown is not
very friendly when it comes to tabular data, CSS-wise.

So in order to not mess with the markdown, I'd figure we could add the css classes via JS.

I didn't really know where would be the best place to put the JS snippet, so feel free to move it around ;)

Cheers,
José Santos