title: Showing Percentages in dc.js Row Charts
body: <p>I have a pie chart that I have converted to a row chart to make it more readable. </p>
  
  <p>In the label for the row chart entries, I want to be able to report on the percentage breakdown for each row (as one could with a pie chart using the start and end angles). </p>
  
  <p>I'm not sure how to add the percentage to the label though. Is this possible?</p>