plot1 done - includes R script and PNG output
fix typo on plot1.R
plot2 R script and putput image
fix typo
plot3 - R script and PNG output
Comment Testing Code
update plot1 with better numeric data
conditionally download file; better plot legend
plot4 - R script and PNG output
Merge pull request #1 from daviddinatale/master

Merge with Dave's personal account