A donut chart of world religions with a color legend. This is example 28 from the screencast Splitting Charts.
forked from curran's block: Religions Pie Chart
https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js
https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.1.0/d3-legend.js