git-svn-id: http://code.djangoproject.com/svn/django/trunk@7890 bcc190cf-cafb-0310-a4f2-bffc1f526a37
initialising SortedDict. Patch from Collin Grady and SmileyChris. git-svn-id: http://code.djangoproject.com/svn/django/trunk@6751 bcc190cf-cafb-0310-a4f2-bffc1f526a37