update footer copyright years
have overflowing code blocks scroll instead
switch 'pygments' option to 'highlighter' due to change in jekyll config specs
clean up indentation
merging
test out redcarpet code fences. they seem to work well.
switch markdown processor to redcarpet (github's) for fancy code fences; update highlighting directive to the new way
remove superflouous spacing between code blocks and other content
update to new version of github style sheet
regen the site