Add support for code highlighting

Code highlighting requires pygments [or atleast that's one approach], but doesn't quite work out of the box. pygments is required by jekyll to convert the md into html that's syntax highlighting ready (html elements with appt. classes), but you also need to include a stylesheet that pygments can also generate the stylesheet for you, which goes something like this :

$ pygmentize -f html -S colorful -a .syntax

see http://pygments.org/docs/cmdline/ for more dets
Fr1st ps0t