title: Django-cms plugin for existing model
body: <p>I have a django project with 'news' applications.
  here is the model:</p>
  
  <pre><code>class News(models.Model):
     title = CharField(max_length=255)
     content = TextField()
  </code></pre>
  
  <p>How can I add django-cms to this project to be able modify news directly in template? I know I need a custom plugin based on 'news' model, and here I have two choices:
  1) I can describe all fields of 'news' model in single plugin, but then there will be a window to edit all fields at once. </p>
  
  <p>plugin, that describes all fields:</p>
  
  <pre><code>class NewsPlugin(CMSPlugin):
      title = CharField(max_length=255)
      content = TextField()
      def __unicode__(self):
          return self.title
  </code></pre>
  
  <p>2) The second idea is about to write plugins for each separate field in 'news' and combine them in some another plugin, but I dont know how to realize it.</p>
  
  <p>separate plugin for news title:</p>
  
  <pre><code>class NewsTitle(CMSPlugin):
      title = CharField(max_length=255)
  </code></pre>
  
  <p>separate pluginn for news content:</p>
  
  <pre><code>class NewsContent(CMSPlugin):
      content = TextField()
  </code></pre>
  
  <p>Any idea?</p>