Remove top and bottom rules from tables in style_green.tex
Remove top and bottom borders from tables in style_green.css
Center blockquotes in ConTeXt
More succinct centering of blockquotes in ConTeXt
Add blockquotes example to resume.md
Reverted to @chmduquesne's style.css (almost)

Two differences are
  * enclosing the whole thing in <style> tags to make possible
    embedding in the <head> of a standalone html document
  * Adding support for tables, which I think people might find useful.