title: Django how to call a choice field in template
body: <p>I have a model field with choices. Like this:</p>
  
  <pre><code>CHAIN_CHOICES = (
          ('P','Public'),
          ('N','Private')
          )
          chain = models.CharField(max_length=1, choices=CHAIN_CHOICES, verbose_name=u"Chain")
  </code></pre>
  
  <p>In my template I would like to call it simillary to this:</p>
  
  <pre><code>&lt;li&gt;&lt;i class="glyphicon glyphicon-tags"&gt;&lt;/i&gt; &lt;span&gt;{{mymodel.chain}}&lt;/span&gt;&lt;/li&gt;
  </code></pre>
  
  <p>Problem is .... this is calling 'N' or 'P' and I would like to call the 'Public' - 'Private' values. 
  Any hint would be wellcome. </p>
  
  <p>Regards,</p>
  
  <p>J.M.</p>