[Opengrads-cooks] recipe for review

[Colleen M. <j.c...@na...>]

The recipe for a script that creates levels and blue to white to red  
colors for negative to positive data is ready for review.

http://cookbooks.opengrads.org/index.php?title=Recipe-xxx:_Blue_to_red_color_bar_for_negative_to_positive_numbers

Thanks,
Colleen