Fixed #10078 - Document use of locales in management commands. Thanks gregoire...

Fixed #10078 - Document use of locales in management commands. Thanks gregoire for the suggestion and ramiro for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15141 bcc190cf-cafb-0310-a4f2-bffc1f526a37