Moved ServerHandler helper class to tests.

It has been only used in the builtin_servers tests since Django 1.4.
Simplified an unnecessarily complex paragraph in view docs
Fixed typo in multipartparser.py
Fixed #21798 -- Added check for DateTime mutually exclusive options

Added DateTimeCheckMixin to avoid the use of default, auto_now, and
auto_now_add options together. Added the fields.E151 Error that is raised
if one or more of these options are used together.
Fixed #21634 -- Prevented hiding ImproperlyConfigured when command not found

Thanks nikolay.v.golub@gmail.com for the report.
cater for running tests from another directory than tests - applying existing pattern to newly added test_testcase_ordering as well
Remove old compatibility shims from d.c.gis.
Merge pull request #2657 from nschlemm/20140516-test_testcase_ordering

cater for running tests from another directory than tests
Fixed #22628 -- Took initial forms into account when combining FormSet.min_num and FormSet.extra.

Forwardport of 79f15ab1ef from stable/1.7.x
Fixed #22579 -- Corrected validation for email to reject trailing slash

Thanks to Claude Paroz for the report and patch and Tomasz
Paczkowski for the review.
Fixed #22490 -- removed obsolete ComplexFeed class from syndication_tests

It was previously used in a test that was deprecated and then removed, this cruft can be removed now.
Removed an unused import
Fixed #22531 -- Added tree.Node.__repr__ and tests for the class.

While Node class has a useful `__str__`, its `__repr__` is not that
useful. Added a `__repr__` that makes use of the current `__str__`.
This is especially useful since the more popular `Q` class inherits
`tree.Node`. Also created new tests that cover most of `Node` class
functionality.
Refs #21798 - Modified error number to provide room for future expansion.
Removed --skip-scripts from extras/Makefile.

This is the default now, see https://bitbucket.org/pypa/wheel/commits/c29f82b4cf76df71f8d55b0f825af6063d3b9892
Fixed #18389 -- Fixed the way contribute_to_class is called

Now this method is only called only if the object is an instance.
This allows to have field classes as model class attributes.
Fixed #22622 -- Added ugettext_lazy import in docs
Fixed #22167 -- Improved documentation on context processors

Clarified the explanation on the order in which user provided variables
to render_to_response, RequestContext and context processors are
loaded.
Fixed #22266 - quote PK before redirecting away from add_view (django.contrib.admin)
Fixed #15716 - Authentication backends can short-circuit authorization.

Authorization backends can now raise PermissionDenied in "has_perm"
and "has_module_perms" to short-circuit authorization process.