Fixed #14570 -- Added new date format character for alternative month names...

Fixed #14570 -- Added new date format character for alternative month names using the new context capabilities. Also add context to Associated Press style month names (refs #9988). Thanks to Claude and shell_dweller.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14899 bcc190cf-cafb-0310-a4f2-bffc1f526a37