Radar plot basic

Referencing issue #982 
Should cover the first 5 points of that issue.

Note: branch targeted to radarPlot as a feature branch
Note: only one dataset can be added and while a dataset can have multiple datums, a single datum is the only tested behavior on my end.
doesn't this mean radius will be negative if the plot size is < 200px by 200px?
@tkimcoop did you try small charts during QE review?