Fixed #14682 - Add a note with an example of the explicit template location...

Fixed #14682 - Add a note with an example of the explicit template location for class based views.  Thanks PaulM for the suggestion, adamv for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15077 bcc190cf-cafb-0310-a4f2-bffc1f526a37