title: Create PyGal graph from pandas dataframe
body: <p>I wanted to try using pygal with it's ability to create SVG data as i'm going to create a printed PDF page from the merged HTML with the SVG graph.</p>
  
  <p>What i want to do is the equivalent of pygal.plot(dataframe) but i'm not seeing that in the docs.</p>
  
  <p>I know that i can do:</p>
  
  <pre><code>df = pd.Series(np.random.randn(5), index = ['a', 'b', 'c', 'd', 'e'])
  chart = pygal.Line()
  for index, row in df.iteritems():
      chart.add(index,row)
  </code></pre>
  
  <p>But that seems wrong from a python point of view. Should i be doing it differently?</p>
  
  <p>Plus how would i do this if the dataframe had multiple columns?</p>