Wagtail now supports Elasticsearch 2. Note that you need to change backend in ``WAGTAILSEARCH_BACKENDS``, if you wish to switch to Elasticsearch 2. This feature was developed by Karl Hobley.
* The ``wagtailforms`` module now provides a ``FormSubmissionPanel`` for displaying details of form submissions; see :ref:`wagtailforms_formsubmissionpanel` for documentation. (João Luiz Lorencetti)
* The Wagtail version number can now be obtained as a tuple using ``from wagtail import VERSION`` (Tim Heap)
*``send_mail`` logic has been moved from ``AbstractEmailForm.process_form_submission`` into ``AbstractEmailForm.send_mail``. Now it's easier to override this logic (Tim Leguijt)
* Image rendition / document file deletion now happens on a post_delete signal, so that files are not lost if the deletion does not proceed (Janneke Janssen)
* "Your recent edits" list on dashboard no longer leaves out pages that another user has subsequently edited (Michael Cordover, Kees Hink, João Luiz Lorencetti)
The data model for image renditions will be changed in Wagtail 1.8 to eliminate ``Filter`` as a model. Wagtail sites using a custom image model (see :ref:`custom_image_model`) need to have a schema and data migration in place prior to upgrading to Wagtail 1.8. To create these migrations:
* Run ``manage.py makemigrations`` to create the schema migration
* Run ``manage.py makemigrations --empty myapp`` (replacing ``myapp`` with the name of the app containing the custom image model) to create an empty migration
* Edit the created migration to contain::
from wagtail.wagtailimages.utils import get_fill_filter_spec_migrations
