Adds generators support for email backends that do not support it.
Fixed #20691 -- Added a note for __str__() vs. __unicode__() and Python 3.

Thanks garrison for the suggestion.
Added check when fetching and updating translations from Transifex

So as syntax errors in po files don't go unnoticed. Refs #20695.
Fixed #20687 -- Added documentation for django.core.signing API.

Thanks Baptiste Mispelon for the suggestion.
Fixed #20609 -- Documented how to use request.user with RequestFactory

Thanks michel@ for the suggestion.
Fixed #20675 -- `check_password` should work when no password is specified.

The regression was introduced by 2c4fe761a. refs #20593.
Fixed #20690 -- Mentioned LOCALE_PATHS earlier in translation docs.

Thanks rene@ for the suggestion.
Fixed #12579 -- Noted QuerySet.get_or_create() depends on database unique constraints.

Thanks timmolendijk, jdunck, vijay_shanker, and loic84.
Fixed #20673 -- Clarified that HttpRequest.user uses AUTH_USER_MODEL.

Thanks littlepig for the report.
Fixed #20134 -- Correct list of fields that UserManager requires.

Thanks semenov and pegler.
fixed grammar
Fixed #19940 -- Made test.runner.setup_databases properly handle aliases for default db.

Thanks simonpercivall.
Merge pull request #1331 from hekevintran/patch-1

fixed grammar
Fixed #19539 -- Updated custom model fields example for Python 3.

Thanks astorije@ for the report.
Fixed #20561 -- Emphasized that QuerySet.distinct([*fields]) is only supported by Postgres.

Thanks jtiai for the suggestion.
Fixed #20224 -- Update docs examples which mention __unicode__

Thanks Marc Tamlyn and Tim Graham for the review.
Deprecate usage of boolean value for widget attributes

Django 1.7 will loudly warn when widget attributes are assigned
boolean values. In Django 1.8, False will mean attribute is not
present while True will mean attribute present without value.
Refs #20684.
Fixed 20613 - moved pickle loads/dumps outside with self._lock.reader()/writer() blocks
Additionaly added pickled=None initially and check for none before
returning in get
Tweaked proj string regex in gis tests
Added release dates for gis libs as doc comments