title: Pandas histogram Labels and Title
body: <p>I'm trying to put x- and y-axis labels as well as a title on a three-panel histogram I  have created through Pandas, but can't seem to place it correctly. The only result I've gotten in the title and an x-axis label on the very last of the three graphs. I want one overall title, xlabel and ylabel. The code that makes the plot is below. Any suggestions?</p>
  
  <pre><code>df1.hist(column='human_den',by='region',sharex=True,sharey=True,layout=(1,3))
  </code></pre>