Update from version 1.33nb1 to 1.37.

Upstream changes:

1.37 - November 18, 2008
    - Extracted the common parts of parse() and parsefile() into one
    method (Refactoring - Shlomi Fish)
    - Incorporated a modified version of a patch from Simon Wistow to
    add support for the "xml:base" attribute.
    - Renamed t/items-are-0.t into the more descriptive
    t/test-generated-items.t , to highlight its significance and make
    it easier to notice.
    - Enabled backwards-compatibility mode for the "description" item
    to not become a hash-ref by default if xml:base is specified.

1.36 - October 7, 2008
    - ->parse() now explicitly returns $self.
        - http://rt.cpan.org/Public/Bug/Display.html?id=34914
    - ->parsefile() now explicitly returns $self.
        - http://rt.cpan.org/Public/Bug/Display.html?id=34914
    - Applied a patch to change the RSS-0.91 DTD URL from my.netscape.com
    to rssboard.org:
        - http://rt.cpan.org/Ticket/Display.html?id=39780
    - Reformatted the Changes file to standardize on 4-space-indents.
    - Small documentation patch: (add_item with dc:date)
        - http://rt.cpan.org/Ticket/Display.html?id=39780

1.35 - September 13, 2008
    - Added a Module::Build-based Build.PL so we'll have an easier time
    with the META.yml and the Kwalitee.
    - Kwalitee - added "use warnings" to all Perl files.
        - now depending on at least perl-5.6.0.
    - Kwalitee - fixed the "use" statement of
    "Test::Run::CmdLine::Iface" to a runtime require.

1.34 - September 12, 2008
    - fixed a typo in the documentation of lib/XML/RSS.pm -
    "regardless" instead of "regarless".
        - http://rt.cpan.org/Public/Bug/Display.html?id=37916
        - (Reported by Reuben Thomas, Fixed by Shlomif).
    - fixed a code fragment - pop() instead of shift() for older
    items, and while() instead of if():
        - http://rt.cpan.org/Public/Bug/Display.html?id=39231
        - (Reported by Dave, Fixed by Shlomif).


(he)