gnu: Django packages no longer propagate Django.

This makes them easier to use with different versions of Django.

(python-django-classy-tags, python-django-debug-toolbar-alchemy,
python-django-jinja, python-django-bulk-update,
python-djangorestframework)[propagated-inputs]: Remove PYTHON-DJANGO.
(python-django-contrib-comments)[propagated-inputs]: Likewise.  Add
PYTHON-SIX.
[native-inputs]: Add PYTHON-DJANGO.
* gnu/packages/django.scm (python-django-extensions,
python-django-simple-math-captcha, python-django-taggit,
python-easy-thumbnails, python-django-haystack, python-django-allauth,
python-django-debug-toolbar, python-django-assets, python-django-picklefield,
python-django-contact-form), python-django-pipeline, python-django-redis,
python-django-rq, python-django-q, python-django-sortedm2m,
python-django-appconf, python-django-statici18n, python-django-sekizai,
python-django-crispy-forms, python-django-override-storage,
python-django-auth-ldap, python-django-logging-json, python-django-netfields,
python-django-url-filter)[propagated-inputs]: Move PYTHON-DJANGO ...
[native-inputs]: ... here.

gnu: Remove python-django-overextends.

This package does not work with newer versions of Django and its functionality
has been superseded by a built-in extends module.

* gnu/packages/django.scm (python-django-overextends): Remove variable.

gnu: Add python-django-url-filter.

* gnu/packages/django.scm (python-django-url-filter): New public variable.

gnu: Add python-django-debug-toolbar-alchemy.

* gnu/packages/django.scm (python-django-debug-toolbar-alchemy): New public
variable.

gnu: Add python-jsonplus.

* gnu/packages/python-xyz.scm (python-jsonplus): New public variable.

gnu: Add python-sqlalchemy-mock.

* gnu/packages/databases.scm (python-alchemy-mock): New public variable.

gnu: Add python-django-netfields.

* gnu/packages/django.scm (python-django-netfields): New public variable.

gnu: Add python-django-logging-json.

* gnu/packages/django.scm (python-django-logging-json): New public variable.

gnu: Add python-django-auth-ldap.

* gnu/packages/django.scm (python-django-auth-ldap): New public variable.

gnu: python-ldap: Update to 3.3.1.

* gnu/packages/openldap.scm (python-ldap): Update to 3.3.1.

gnu: Deprecate python-django-jsonfield.

* gnu/packages/django.scm (python-django-jsonfield): Rewrite in terms of
DEPRECATED-PACKAGE with PYTHON-DJANGO as the replacement.

gnu: Remove python2 versions of Django packages.

Python 2 is EOL and not supported by current versions of Django.

* gnu/packages/django.scm (python-django, python-django-tagging)[properties]:
Remove PYTHON2-VARIANT.
* gnu/packages/django.scm (python2-django, python2-django-simple-math-captcha,
python2-pytest-django, python2-django-filter, python2-django-allauth,
python2-django-gravatar2, python2-django-assets, python2-django-jsonfield,
python2-dj-database-url, python2-django-bulk-update,
python2-django-contact-form, python2-django-contrib-comments,
python2-django-overextends, python2-django-redis, python2-django-rq,
python2-django-sortedm2m, python2-django-appconf, python2-django-statici18n,
python2-django-tagging): Remove variables.

gnu: python-django-override-storage: Update to 0.3.0.

* gnu/packages/django.scm (python-django-override-storage): Update to 0.3.0.
[source]: Switch to GIT-FETCH.
[arguments]: New field.
[native-inputs]: Add PYTHON-MOCK.

gnu: python-django-sekizai: Update to 2.0.0.

* gnu/packages/django.scm (python-django-sekizai): Update to 2.0.0.

gnu: python-django-statici18n: Update to 1.9.0.

* gnu/packages/django.scm (python-django-statici18n): Update to 1.9.0.
[source]: Switch to GIT-FETCH.
[arguments]: New field.
[native-inputs]: Add PYTHON-PYTEST and PYTHON-PYTEST-DJANGO.

gnu: python-django-appconf: Update to 1.0.4.

* gnu/packages/django.scm (python-django-appconf): Update to 1.0.4.
[arguments]: New field.
[propagated-inputs]: Remove PYTHON-SIX.

gnu: python-django-sortedm2m: Update to 3.0.2.

* gnu/packages/django.scm (python-django-sortedm2m): Update to 3.0.2.
[arguments]: Remove #:tests?.  Add #:phases.
[home-page]: Update to current.

gnu: python-django-q: Update to 1.3.3.

* gnu/packages/django.scm (python-django-q): Update to 1.3.3.
[arguments]: Add #:tests?.  Remove #:phases.
[native-inputs]: Remove.

gnu: python-django-rq: Update to 2.3.2.

* gnu/packages/django.scm (python-django-rq): Update to 2.3.2.
[native-inputs]: Add PYTHON-DJANGO-REDIS, PYTHON-MOCK, and PYTHON-RQ-SCHEDULER.

gnu: Add python-rq-scheduler.

* gnu/packages/databases.scm (python-rq-scheduler): New public variable.