Wagtail is now compatible with Django 1.10. Thanks to Mikalai Radchuk and Paul J Stevens for developing this, and to Tim Graham for reviewing and additional Django core assistance.
* Multiple ChooserBlocks inside a StreamField are now prefetched in bulk, for improved performance (Michael van Tellingen, Roel Bruggink, Matt Westcott)
* Added formal APIs for customising the display of StructBlock forms within the page editor - see :ref:`custom_editing_interfaces_for_structblock` (Matt Westcott)
The ``choices`` field on the ``wagtailforms.models.AbstractFormField`` model has been changed from a ``CharField`` to a ``TextField``, to allow it to be of unlimited length. If you are using the ``wagtailforms`` module in your project, you will need to run ``python manage.py makemigrations`` and ``python manage.py migrate`` after upgrading, in order to apply this change to your form page models.
The ``wagtailimages.Filter`` model has been removed, and replaced with a ``Filter`` class instead. This class can be imported from the same location as the model: ``wagtail.wagtailimages.models.Filter``. The ``Filter`` class has the same API as the ``Filter`` model did, with the exception that Model methods such as ``Filter.save()``, and ``Filter.objects.get()`` have been removed.
The mixin class ``wagtail.wagtailadmin.taggable.TagSearchable``, used internally by image and document models, has been deprecated. If you are using custom image or document models in your project, the migration(s) which created them will contain frozen references to ``wagtail.wagtailadmin.taggable.TagSearchable``, which must now be removed. The line:
