[1.2.X] Fixed #14804 -- Metadata improvement, broken link fix, and...

[1.2.X] Fixed #14804 -- Metadata improvement, broken link fix, and alphabetization of template filters in contrib.humanize reference docs. Thanks to adamv for the patch.

Backport of [14746] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14747 bcc190cf-cafb-0310-a4f2-bffc1f526a37