Ahodges/doc/doc1119

@shnayder @WatsonEmily @dsjen @srpearce @stroilova here's the initial draft for the gender demographic data. I don't have access to real data yet, so can't quite finish up the screen-shot-and-its-interpretation piece. (Suggestions on a good illustration welcome)
that's the issue captured in AN-3899 this morning -- I can't get any screenshots (or example interpretations) until we're hooked up to real data.