Generally tightening the display of major page elements to match the mockup.

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Formatting code a bit better;
Switching "Recent Updates" code from a widget of this site's posts to a scan of the news blog for the "Chomsky" tag.

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>