wrap long words in field labels on admin forms, closes #18755

Otherwise, words overlap into the fields themselves, which makes the labels
unreadable.
Fixed #19690 - Removed unused import
Removed an import of a class unused in the Ajax example.
Deprecated undocumented warnings manipulation testing tools.
Fixed #19711 -- Typo in __all__ declaration in django/test/simple.py
Merge pull request #690 from rafales/ticket_19711

Fixed #19711 -- Typo in django.test.simple.__all__
Added introspection tests for most of Django model fields
Fixed #19709 -- Fixed TimeField introspection on MySQL

Thanks Eugene Grachev for the report.
Fixed #19341 -- Detected NullBooleanField when introspecting models

Thanks Tim Bowden for the report.
Fixed dict randomization issue in inspectdb
Renamed inspectdb field names for clarity
Set bigger maxDiff for ogrinspect tests
Fixed #19714 -- Updated documentation about TemplateView context

Thanks Aramgutang for the report. Refs #17228.
Fixed #19715 -- Simplified findstatic output when verbosity set to 0
Documented ArchiveIndexView's date_list context variable.

Refs #16218.
Added myself to core developpers
Merge pull request #334 from dlo/tickets/18755

Fixed #18755 -- Wrapped long admin forms fields labels.
Fix rst syntax error.

Thanks Chris Rebert for the report.
Avoided ambiguous output when runserver port is already in use.

Thanks James Pic for the suggestion (PR 88).
Fixed #19663 -- Allowed None in colorize() text parameter

Thanks Jonathan Liuti for the report and the initial patch, and
Simon Charette for the review.
Merge pull request #682 from LucianU/master

Fixed #19690 - Removed unused import in doc examples