refactored drawing methods across newly speciated class hierarchy
consolidated and renamed demos
renamed staticStreamingPlot to solidStreamingPlot
added scatter plot demo
split out pulse plot demo from streaming demo
rest of demo choices thus far
need super call to get inherited default init
release path to avoid memory leak
need super call to get inherited default init
added xMin, xMax, xRange and xScale which replace maxNumberOfValues as well
calculate yRange and yScale in the right place and whenever yMin or yMax are set
rearranged placement