Fixed #7980 - Improved i18n framework to support locale aware formatting (dates and numbers) and form processing.

Thanks to Marc Garcia for working on this during his Google Summer of Code 2009!

Additionally fixes #1061, #2203, #3940, #5526, #6449, #6231, #6693, #6783, #9366 and #10891.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11964 bcc190cf-cafb-0310-a4f2-bffc1f526a37