title: Allow a model instance to be added to the moderation queue based on a condition using Django-Moderation
body: <p>Given a model as :  </p>
  
  <pre><code>class Blog(models.Model):
      title = models.CharField(max_length=200)#Title of the Post
      body = models.TextField(blank=False)
      state = models.CharField(max_length=60,choices=STATE_CHOICES,default='raw')`
  </code></pre>
  
  <p>A blog instance is added to Django-Moderation's moderation queue only if <code>state=published</code>  </p>