Fixed #16793. Added more cross referencing to the load tag's documentation. ...

Fixed #16793. Added more cross referencing to the load tag's documentation.  Thanks to bluejeansummer for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16774 bcc190cf-cafb-0310-a4f2-bffc1f526a37