Fixed #5670 -- Changed the validation of the UK postcode widget to allow for...

Fixed #5670 -- Changed the validation of the UK postcode widget to allow for easier input. Normalisation still returns the same things as previously. Patch from scott@staplefish.com.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6952 bcc190cf-cafb-0310-a4f2-bffc1f526a37