Fixes 8312. Italian translation: lowercased names of languages, months and...

Fixes 8312. Italian translation: lowercased names of languages, months and weekdays. Thanks for the patch, steadicat.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8350 bcc190cf-cafb-0310-a4f2-bffc1f526a37