title: tags of content written by django_summernote is exposed, not applied
body: <p>I start using Django for personal blog building, and just install django_summernote as an editor. </p>
  
  <p>However when I get the text in html templets, the html tags of main articles are exposed, not applied properly. It looks like below.</p>
  
  <pre><code>Here is the main text. 
  Hellow World! First Post &lt;h1&gt;&lt;span style="font-family: Arial;"&gt;Hello, 
  World!&lt;/span&gt;&lt;/h1&gt;&lt;p&gt;&lt;span style="font-family: Arial;"&gt;This is my first 
  post.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;br&gt;&lt;/p&gt; 
  </code></pre>
  
  <p>Where the templet is like below.</p>
  
  <pre><code>&lt;div id="middle_canvas"&gt;
      Here is the main text. &lt;br&gt;
  
      {% for post in recent_posts %}
          {{ post.title }}
          {{ post.text }} &lt;br&gt;&lt;br&gt;
      {% endfor %}
  &lt;/div&gt;
  </code></pre>
  
  <p>Also, the Post model is like below.</p>
  
  <pre><code>class Post(models.Model):
      author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
      title = models.CharField(max_length=200)
      text = models.TextField()
      created_date = models.DateTimeField(
          default=timezone.now)
      published_date = models.DateTimeField(
          blank=True, null=True)
  
      def publish(self):
          self.published_date = timezone.now()
          self.save()
  
      def __str__(self):
          return self.title
  </code></pre>
  
  <p>I have no idea where to check.</p>