title: Change Font Size on rCharts Sankey Diagram
body: <p>I'm using the following code to create a Sankey Diagram using rCharts.  I wish to increase the font size of the text printed on the Sankey Diagram.  I can't find a manual to show me how to do this.  Thoughts?</p>
  
  <pre><code>rm(list = ls())
  require(reshape)
  require(rCharts)
  require(rjson)
  target &lt;- c('TMF', 'TMF', 'TMF','Evaporation','Mill Reclaim','Void Losses','Seepage')
  source &lt;- c('Precipitation &amp; Run Off','Slurry','Other','TMF','TMF','TMF','TMF')
  value &lt;- c(638,1610,755,118,1430,466,2)
  x &lt;- data.frame(target,source,value)
  sankeyPlot &lt;- rCharts$new()
  sankeyPlot$set(
  data = x,
  nodeWidth = 10,
  nodePadding = 10,
  layout = 32,
  width = 1100,
  height = 675,
  units = "cubic metres",
  title = "Sankey Diagram"
  )
  sankeyPlot$setLib('http://timelyportfolio.github.io/rCharts_d3_sankey')
  sankeyPlot
  </code></pre>