Fix SchemaEditor.__exit__ to handle exceptions correctly
Fixed #10164 -- Made AutoField increase monotonically on SQLite

Thanks malte for the report.
documented RelatedManager calling save() behind the scenes, added section on direct replacement of related object set
Fixed #20975 -- Fixed identation in docs/internals/committers.txt

Thanks EvilDMP for the report.
Merge pull request #1560 from technivore/ticket_20970

Related Fields documentation improvements
Fixed #21029: Test for previously-commited SchemaEditor.__exit__ bug.
Project/ModelState now correctly serialize multi-model inheritance
Also test failure case of ProjectState dependency resolution
Fixed #20812 -- Error out if __unicode__/__str__ doesn't return a text type.
Fixed awkward indentation in admin URLconfs
Added AdminSite attributes for easily changing admin title.
AdminSite now has overridable site_header, site_title and index_title attributes. Changed
each admin view to pass these to the context (in a new AdminSite.each_context() method).
The intent here is to make it easier to override these things in the common case, instead of
having to override a template, which is a bigger burden.
Migration autodetector now corerctly deals with proxy models
Consolidated documentation for F() and Q()
Merge pull request #1544 from evildmp/ticket_20920_rebase

Fixed #20920 -- Consolidated F() and Q() documentation
Fixed instructions for running a subset of tests.
Fixed #11857 -- Added missing 'closed' property on TemporaryFile class.

- TemporaryFile now minimally mocks the API of the Python standard
  library class tempfile.NamedTemporaryFile to avoid AttributeError
  exceptions.
- The symbol django.core.files.NamedTemporaryFile is actually assigned
  as a different class on different operating systems.
- The bug only occurred if Django is running on Windows, hence why it
  was hard to diagnose.
re-indented method documentation within RelatedManager
Fixed #4287 -- Fixed NaN and +/- Infinity handling in FloatField

NaN, +Inf, and -Inf are no longer valid values for FloatFields.
Merge branch 't20812'
Merge pull request #1567 from technivore/ticket_20970

re-indented method documentation within RelatedManager