Addepar/ember-charts — pull request #7 by joelcox (2013-11-29 15:03:59+00:00)
Title: Added 'innerRadius' property to pie chart.

Hey there,

I added a inner radius property to the pie chart which allows you to create donut charts. The `innerRadius` is proportional to the `radius`, so a `radius` of 100 and an `innerRadius` of 0.5 will result in a innerRadius of 50px.