remove sidebars from r-bloggers.com
R-bloggers seems to be a curated aggregator of R-related blog posts from across the web.
It comes up early in google search results and is often the first source of relevant
R infomation.
However r-bloggers.com reformats the content into a relatively narrow alley surrounded
by left- and right-sidebars with low-value content.
This greasemonkey script gets rid of the sidebars and allows the center content to expand to fill the space.
