title: Django-tables2 render merged tables
body: <p>I use django-tables2 and have following table, which is populated by generated dictionary:</p>
  
  <pre><code>class SimpleStatTable(tables.Table):
      Metric = tables.Column(accessor='metric')
      Qty = tables.Column(accessor='qty')
      Min = tables.Column(accessor='min')
      Avg = tables.Column(accessor='avg')
      Max = tables.Column(accessor='max')
  
      def __init__(self, data, label=None, **kwargs):
          self.label = label
          super(SimpleStatTable, self).__init__(data, **kwargs)
  
      class Meta:
          order_by = ('Metric',)
          empty_text = 'No data presented'
  </code></pre>
  
  <p>I want to render merged table of a few SimpleStatTable tables. Is it possible with django-tables2? I like django-tables2 features, such as sorting</p>
  
  <p>I have a small <a href="http://jsfiddle.net/KDQ23/" rel="nofollow noreferrer">example</a> of desired tables.</p>
  
  <p>I suppose i need to generate class for merged table dynamically like <a href="https://stackoverflow.com/questions/14366098/django-list-of-dictionaries-to-tables2/">here</a>, but how can i add additional merged column?</p>