Demo: http://bl.ocks.org/2011590
Implements Chernoff faces for d3.
Exposes 8 parameters through functons to control the facial expression.
- face shape of the face
{0..1} - hair shape of the hair
{-1..1} - mouth shape of the mouth
{-1..1} - noseh height of the nose
{0..1} - nosew width of the nose
{0..1} - eyeh height of the eyes
{0..1} - eyew width of the eyes
{0..1} - brow slant of the brows
{-1..1}