title: Pandas - scatter matrix set title
body: <p>I'm searching for a way to set a title to Pandas <code>scatter matrix</code>:</p>
  
  <pre><code>from pandas.tools.plotting import scatter_matrix
  scatter_matrix(data, alpha=0.5,diagonal='kde') 
  </code></pre>
  
  <p>I tried <code>plt.title('scatter-matrix')</code> but it creates a new figure.</p>
  
  <p>Any help is appreciated.</p>