Updated Transifex links to the Django project

Translations for the Django framework are now hosted on the
django-core Transifex project, and the django project is only
dedicated to a team-only hub project.
Removed an errant ipdb import from commit 9777442
Negligible formatting fixes in query_utils.py
Converted a list comprehension into a generator expression in query_utils.py
Fixed #20321 -- Added missing key name in MergeDict KeyError message

Thanks mark.harviston et gmail.com for the report.
Fixed #18336 -- Doubled request_queue_size.

This reduces random failures to load static files with Google Chrome.
Pointed to the docs version switcher in tutorial 1.

Refs #20324. Thanks dwisehart for the suggestion.
Fixed #18986 -- Improved error message for missing files

in CachedStaticFilesStorage. Thanks zyegfryed for his work on the patch.
Tested that get_or_create raises IntegrityError.

It used to raise "DatabaseError: no such savepoint" with the old
transaction management. Closes #15117.
Corrected "it's" to "its" when used possessively.

Fixed #20327.
Fixed #20330 -- Normalized spelling of "web server".

Thanks Baptiste Mispelon for the report.
Fix two typos in database transactions docs
Merge pull request #1034 from infraredgirl/master

Fix two typos in database transactions docs
Fixed #20336 -- Removed obsolete paragraph from the docs.

Thanks Baptiste Mispelon.
Fixed #19252 -- Added support for wheel packages.

Signed-off-by: Jannis Leidel <jannis@leidel.info>
Fixed test failures introduced in a5becad9094e5c5403b692b9a7b3a6ffaabf64a3.
Fixed #20338 - Document FQDN behavior with ALLOWED_HOSTS
Updated translation templates and removed en translations

"en" translations have been mistakenly committed in 87cc3da81.
Added myself to the committers list.
Used ngettext in a formsets error message

Several languages will distinctly translate '%d or fewer forms'
depending on the variable.