title: Drilldown with NVD3.js charting library
body: <p>I have a regular column chart and I would like to be able to click on a column and drilldown to a set of related information. This behavior is similar to how highcharts <a href="http://www.highcharts.com/demo/column-drilldown" rel="nofollow">demo</a> does drilldown. Has anyone been able to implement this in nvd3.js?</p>