The core templatetags (``pageurl``, ``slugurl``, ``image``, ``richtext`` and ``wagtailuserbar``) are now compatible with Jinja2 so it's now possible to use Jinja2 as the template engine for your Wagtail site.
Wagtail's image and document models now provide a ``search`` method on their QuerySets, making it easy to perform searches on filtered data sets. In addition, search methods now accept an ``operator`` keyword argument, to determine whether multiple search terms will be treated as 'or' (any term may match) or 'and' (all terms must match).
Inline panels now accept the optional parameters ``max_num`` and ``min_num``, to specify the maximum / minimum number of child items that must exist in order for the page to be valid.
The ``Image.search`` and ``Document.search`` methods have been deprecated in favour of the new QuerySet-based search mechanism - see :ref:`wagtailsearch_images_documents_custom_models`. Code using the old ``search`` methods should be updated to search on QuerySets instead; for example: