title: Show inline model field in list_display
body: <p>I have two models:</p>
  
  <pre><code>class Person(models.Model):
      person_name = models.CharField(max_length=255)
  
      def __unicode__(self):
          return self.person_name
  </code></pre>
  
  <p>and </p>
  
  <pre><code>class Book(models.Model):
      link = models.ForeignKey(Person)
      book_name = models.CharField(max_length=255)
      book_year = models.CharField(max_length=255)
      book_email = models.CharField(max_length=255)
  
      def __unicode__(self):
          return self.name
  </code></pre>
  
  <p>admin.py</p>
  
  <pre><code>class PersonAdmin(admin.ModelAdmin):
      inlines = ('BookInline',)
      list_display = ('person_name', ...)
  
  class BookInline(admin.TabularInline):
      model = Book
      extra = 1
      max_num = 1
  </code></pre>
  
  <p>In <code>PersonAdmin</code> list_display, how can i show the inline model <code>Book</code> fields (title, name, email). </p>
  
  <p>so when i access <code>Person</code> list of entries in django admin, i see: </p>
  
  <p><code>person name</code> <code>book name</code> <code>book year</code> <code>book email</code></p>