Clearer explanation when exception has no message

"No exception supplied" is misleading; actually there is an exception,
but there's no message string.
Fixed comments for translators example in the i18n documentation

The documentation regarding adding a comment for translators was confusing
as the example contained mismatching tags.
Merge pull request #1201 from takis/docs_typo

Fixed comments for translators example in the i18n documentation
Made fix for #9321 less buggy and more effective.

Don't try to be smart about building a good-looking help string
because it evaluates translations too early, simply use the same old
strategy as before. Thanks Donald Stufft for the report.

Also, actually fix the case reported by the OP by special-casing
CheckboxSelectMultiple.

Added tests.

Refs #9321.
Fixed #19237 (again) - Made strip_tags consistent between Python versions
Fixed #20080 - Recommended use of PYTHONHASHSEED

Thanks jacob for the suggestion and ryankask
for the patch.
Fixed #20482 - Added a file reference in tutorial 3.

Thanks diek@ for the suggestion.
Fixed #20417 - Noted that a server restart is required to load new templatetag modules.

Thanks Katya for the suggestion.
Fixed #20474 -- Proxied and deprecated django.db.backend
Delayed settings.DATABASES usage by ConnectionHandler

Refs #20474.
Delayed settings.DATABASE_ROUTERS usage by ConnectionRouter

Refs #20474.
Fixing some FIXMEs in howto-release-django. Refs #20082
Update my employer.
Added back a link to docs/internals/committers.txt
Fixed #20316 - Clarified transaction behavior of TestCase.

Thanks uberj@ for the report and lolek09 for the patch.
Removed noise from pre_syncdb signal tests

Only make assertions that actually test the functionality of the
change and not unrelated pieces.
Fixed #17648 -- Add `for_concrete_model` to `GenericForeignKey`.

Allows a `GenericForeignKey` to reference proxy models. The default
for `for_concrete_model` is `True` to keep backwards compatibility.

Also added the analog `for_concrete_model` kwarg to
`generic_inlineformset_factory` to provide an API at the form level.
Fixed #19607 - prefetch_related crash

Thanks to av@rdf.ru and flarno11@yahoo.de for the report.
Optimisation in prefetch_related_objects
Link to active fork for ODBC backend

It took me quite some time to find if and where the ODBC backend was maintained.
I found (on djangoproject.com):
http://code.google.com/p/django-pyodbc/ (last commit about 3 years ago)
then:
https://github.com/avidal/django-pyodbc avidal fork.
then:
https://github.com/aurorasoftware/django-pyodbc/ aurorasoftware version which has avidal improvements merged.

Avidals version now links to https://github.com/aurorasoftware/django-pyodbc/ which is also the version installed through PIP.