Add Vertical (Violin) Y-Axis Scaling

[Daniel Marsh-Patrick]

In the prototype, this is hard-coded but needs to be done dynamically in series. We've added the yVScale property to the view model, but we need to make sure it's accessed when drawing.

[Daniel Marsh-Patrick]

#18: Removed original line generation function and replaced with the appropriate one from the view model data. Resolves #18.

→ <<cset 1c6336b16456>>