Cleaned up plot script.
Cleaned-up line plot.
Added density plots, font tricks.
Adding new gnuplot styles
Adding gnuplot styles
Adding matplotlib plotting examples
Adding gitignore for plot output
Added README
Added matching built-in cmaps

Paul Tol's colormaps are close to some built-in colormaps for
matplotlib. I added this to the script.
Typo, not RdOrBr but YlOrBr
Merge branch 'public'