Converted the Herbicide, Insectide, Fungicide graphs to ggplot2.  This converted the different analytes to be represented by different colors and exceedances of relevant criteria to be different shapes.  Need to check with team to see if that is ok.

In this process, added "Selected Common" herbicides, insectides, and fungicides.  Still thinking about how to "combine" simazine and atrazine with their daughters.

Also enhanced the existing multiplot and single plot graphs.

Added state-wide statistics table as an output.  Not sure how useful it is, since it aggregates sooooo much data.

New criteria for Atrazine!

JCrown