title: access to bin counts in seaborn distplot
body: <p>In pyplot's <a href="http://matplotlib.org/api/pyplot_api.html?highlight=hist#matplotlib.pyplot.hist" rel="noreferrer">hist()</a> function, we are able to access the values of the histogram bins (through the return <code>n</code>); is it possible to access this same information from <a href="http://stanford.edu/~mwaskom/software/seaborn/generated/seaborn.distplot.html" rel="noreferrer">Seaborn's distplot</a>?  Seaborn only returns an axis object.</p>
  
  <p>Ultimately, I'd like juxtapose a line plot on top of the histogram which sums the counts in the bins.</p>