Reusable CSS

[darobin]

It would be nice to have the CSS for Scholarly HTML be a reusable product that people could simply link to, and then customise a little bit. It's not much work, just a clean split. We could exemplify a few alternate themes.

For fun, we could do a ReTeX, as an equivalent to remarkdown that renders the article as if it were LaTeX source. For all you nostalgic LaTeX lovers out there!