[Radar] - Basic functionality / plot

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.
I want to avoid default project in the constructor, but I think it's valid that the color shouldn't be overridden.  I'll operate similar to the default idea in pieplot