A couple of things to help make ternary plots in d3

The two things

1. A scale tgp.d3.plot() that converts ordered triplets into x/y coordinates based on a range property (also you can draw lines).

2. An axis renderer which takes a plot and draws a triangle with subdivisions. TO DO: add axis labels.

Have a look at index.html for example usage

Note: Bower? who uses Bower anymore? I really should update this.