Fixed #8962 -- Consistently support format and input_format in the various...

Fixed #8962 -- Consistently support format and input_format in the various (individual, combined, split) date and time form fields and widgets.

Many thanks to Tai Lee for doing all the work here.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@10115 bcc190cf-cafb-0310-a4f2-bffc1f526a37