title: django tables2 create extra column with links
body: <p>I am trying to add a extra column to one of my tables, that adds url to another page.</p>
  
  <p>My Table:</p>
  
  <pre><code>class ItemTable(tables.Table):
      edit = tables.LinkColumn('item_edit', args=[A('pk')])
      class Meta:
          model = Item
          fields = ('name', 'slot', 'klass', 'rarity', 'price')
  </code></pre>
  
  <p>my urls:</p>
  
  <pre><code>url(r'^admin/item/edit/(?P&lt;item_id&gt;\d+)/$', views.item_edit, name='item_edit')
  </code></pre>
  
  <p>Now with this, i get my table, but the last column (edit) only has dashes + the page crashes when i click the title.</p>
  
  <p>i have been looking at <a href="http://django-tables2.readthedocs.org/en/latest/#django_tables2.columns.LinkColumn" rel="noreferrer">http://django-tables2.readthedocs.org/en/latest/#django_tables2.columns.LinkColumn</a>  and im not sure where i go wrong</p>