title: Exporting a python dataframe + text element to an image
body: <p>I want to print a data frame as a png image, and followed the following approach.</p>
  <pre><code>import pandas as pd
  import dataframe_image as dfi
  
  data = {'Type': ['Type 1', 'Type 2', 'Type 3', 'Total'], 'Value': [20, 21, 19, 60]}
  df = pd.DataFrame(data)
  dfi.export(df, 'table.png')
  </code></pre>
  <p>I however want to also print a date stamp above the table on the image - with the intention of creating a series of images on consecutive days. If possible I would also like to format the table with a horizontal line indicating the summation of values for the final 'Total' row.</p>
  <p>Is this possible with the above package? Or is there a better approach to do this?</p>