wrap long words in field labels on admin forms, closes #18755

Otherwise, words overlap into the fields themselves, which makes the labels
unreadable.
Fixed #10239 - Added docs for modelform_factory

Thanks ingenieroariel for the suggestion and slurms for the review.
Fixed #19437 - Clarified pip install instructions in contributing tutorial.
Adapted test assertion against yaml dump

Fixes #12914 (again).
Fixed #19360 -- Raised an explicit exception for aggregates on date/time fields in sqlite3

Thanks lsaffre for the report and Chris Medrela for the initial
patch.
Made dev server autoreloader ignore filenames reported as None.

Useful under Jython. Thanks Thomas Bartelmess for the report and patch.

Ref #9589.
Fixed code examples in which render() calls were missing `request` parameter.
Minor DEBUG setting reference formatting edit.
Fixed #4833 -- Validate email addresses with localhost as domain
Fixed #19585 -- Fixed loading cookie value as a dict

This regression was introduced by the 'unicode_literals' patch.
Fixed #19488 -- Made i18n_patterns redirect work with non-slash-ending paths

Thanks Daniel Gerzo for the report and the initial patch.
Removed some now dead code from deletion (thanks to Carl Meyer for noticing it).
Fixed #18026 -- Don't return an anonymous dict if extra_data in storage is empty.
Fixed #19024 -- Corrected form wizard docs for get_form_prefix.
Return namedtuple from get_table_description

We don't make use of it currently to not break third-party db
backends.
Fixed #17574 -- Implemented missing get_key_columns in PostgreSQL backend
Fixed #14633 - Organized settings reference docs and added a topical index.

Thanks Gabriel Hurley for the original idea
and adamv for the draft patch.
Fixed typo in file storage docs.

Thanks Jørgen Abrahamsen.
Added details on minified jQuery and DEBUG mode for contrib.admin.

Thanks Daniele Procida.
Send post_delete signals immediately

In a normal relational construct, if you're listening for an event
that signals a child was deleted, you dont expect that the parent
was deleted already.

This change ensures that post_delete signals are fired immediately
after objects are deleted in the graph.