title: Plot the whole pandas DataFrame with Bokeh
body: <p>I would like to plot a whole pandas DataFrame with Bokeh. I.e., I am looking for a Bokeh equivalent of the third line:</p>
  
  <pre><code>import pandas as pd
  income_df = pd.read_csv("income_2013_dollars.csv", sep='\t', thousands=',')
  income_df.plot(x="year")
  </code></pre>
  
  <p>Is there currently a way to do that, or do I have to pass each y-value separately?</p>