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.
Update link to jQuery Cookie plugin site
Updated my bio
Merge pull request #1209 from tax/master

Updated link to active project for ODBC backend
Merge pull request #1210 from alasdairnicol/jquery_cookie_plugin_link

Updated link to jQuery Cookie plugin site
Fixed #20492 - Removed a broken link in GIS docs.
Fixed a regression in router initialization

Regression was introduced in 6a6bb168b. Thanks Bas Peschier for the
report.
Rotate CSRF token on login
Merge branch 'master' into ticket/19866-susop

Conflicts:
	docs/releases/1.6.txt
properly document context manager
updated exception docs
confirm specific subclasses of SuspOp being raised