gnuplot to produce fig output and then mangle it to fill in the bars. Any number
of clustered datasets are supported, as well as automatic averaging and other
features.
WWW: http://www.burningcutlery.com/derek/bargraph/
PR: ports/166410
Submitted by: Dereckson <dereckson@gmail.com>
Approved by: wen@ (co-mentor)
Feature safe: yes
