[1.7.x] Added 1.6.3 release note for refs #22256.
[1.7.x] Fixed #22347 -- Unified FileSystemStorage documentation.

Thanks nliberg for the report.

Backport of ca93f02c62 from master
[1.7.x] Document removal of GeoDjangoTestSuiteRunner in 1.6 release notes.

e6ced2bb08 from master.
[1.7.x] Fixed #22372 -- Improved description of WizardView.get_context_data().

Thanks simon29 for the report.

Backport of a8e2ec0e82 from master
[1.7.x] Fixed #22363 -- Correctly serialize `django.utils.datetime_safe` objects.

Thanks to linovia for the report.

Backport of 074d3183d9 from master
[1.7.x] Refactored and commented strip_tags utility

Backport of c28beb4291 from master.
[1.7.x] Fixed #22380 -- Missing SECRET_KEY variable in sample settings file for testing

Backport of 8f621b83e9 from master.
[1.7.x] Fixed #21649 -- Added optional invalidation of sessions when user password changes.

Thanks Paul McMillan, Aymeric Augustin, and Erik Romijn for reviews.

Backport of fd23c06023 from master
[1.7.x] Fixed #22216 -- Added Form.non_field_errors to form API doc.

Backport of d2f4553d705951ca8043d687f9493c559f494a0c from master
[1.7.x] Fixed #21084 -- Used proxy model's content type for admin log entries.

Backport of 7a7f6fccae from master
[1.7.x] Fixed #21084 -- Used proxy model's content type for admin log entries.

(the previous commit included only the test)

Backport of 3cba90f22a from master
[1.7.x] Added missing request parameter to get_current_site().

Backport of d6c9bdd825 from master
[1.7.x] Fixed #22405 -- Fixed string error in models/queries docs.

Backport of 36de29200e1ea713c278f7672ab1790e1500c423 from master.
[1.7.x] Fixed #9535 -- Added a reference guide for file upload classes.

Backport of c8c2b8a638 from master
[1.7.x] Fixed casing of "GeoDjango".
[1.7.x] Added Python 3.4 to list of supported version in docs/intro/install.txt

Backport of a1fa6fcabc from master
[1.7.x] Fixed #16205 -- Added an installation for Windows.

Backport of d35d2f61c5 from master
[1.7.x] Refs #21230 -- removed direct settings manipulation from signed cookies tests

Backport of b9bfcd82f0 from master
[1.7.x] Fixed small typo in django-admin.txt

The word 'by' seemed to be missing from the first line of the compilemessages command.

Backport of 5ca522b9ed from master
[1.7.x] Noted that pip is included with Python 3.4 in Windows install guide.

Thanks CHI Cheng.

Backport of 11e7254c3d from master