http://www.jeromecukier.net/blog/2013/03/05/d3-tutorial-at-strata-redux/
transition parameter inheritance d3/d3#400 (comment)
DRYing up D3 http://urbanairship.com/blog/2013/07/11/drying-up-d3
Reusing charts http://weblog.bocoup.com/reusability-with-d3/
sunburst - mouse clicks & arc resizing http://bl.ocks.org/mbostock/1306365
arcs & text labels http://bl.ocks.org/mbostock/910126
arc resizing http://blog.stephenboak.com/2011/08/07/easy-as-a-pie.html