3.1

• Django 1.11 compatibility
• Python 3.6 compatibility
• Added the ability to install the optional dependency django-taggit
  using pip install django-modelcluster[taggit]
• Fix: ClusterForm.save(commit=True) now correctly writes ParentalManyToManyField relations back to the database rather than requiring a separate model.save() step
• Fix: ClusterForm.is_multipart() now returns True when a child form requires multipart submission
• Fix: ClusterForm.media now includes media defined on child forms
• Fix: ParentalManyToManyField.value_from_object now returns correct result on unsaved objects