title: Position of the legend in a Bokeh plot
body: <p>Does anyone know how to carry the legend in bokeh <strong>outside</strong> of the graph? The only manipulation I could do was to choose a position among:</p>
  
  <pre><code>top_right, top_left, bottom_left or bottom_right
  </code></pre>
  
  <p>using:</p>
  
  <pre><code>legend()[0].orientation = "bottom_left"
  </code></pre>
  
  <p>and when I try different ones I get the error message:</p>
  
  <pre><code>ValueError: invalid value for orientation: 'outside'; allowed values are top_right, top_left, bottom_left or bottom_right
  </code></pre>