Fixed #15046 -- Added "CHROMEFRAME" as a user agent alias for various MSIE...

Fixed #15046 -- Added "CHROMEFRAME" as a user agent alias for various MSIE fixes. Thanks to chrj for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15340 bcc190cf-cafb-0310-a4f2-bffc1f526a37