Update Pod-Simple to CPAN version 3.15

Update Pod-Simple to CPAN version 3.15

  [DELTA]

  2010-11-11   David E. Wheeler <david@justatheory.org>
        * Release 3.15

        Removed "perlpod.pod" and "perlpodspec.pod". These now just live
        in the Perl core.

        Fixed stylesheet names output by HTMLBatch to match the names of
        the actual stylesheet files (broken in 3.09). Thanks to Kevin Ryde
        for the report (RT #56725).

        Added missing closing slash to the CSS links in the XHTML output.
        Thanks to HarleyPig for the patch!

        Added parens around bar "qw(...)" in t/xhtml05.t. Thanks to Jerry
        D. Hedden for the patch.

        Improved the Pod::Simple::HTML docs. Thanks to Gabor Szabo for the
        patch.

        Pod::Simple::XHTML now properly encodes entities in URLs in the
        anchor tag. Thanks to John McNamara for the report (RT-60249).

        Pod::Simple::HTML and XHTML now strip whitespace from the end of
        section names that appear as anchor names for headers (in HTML)
        and IDs (in XHTML). Such whitespace appeared when "X<>" entities
        were stripped out but not the space between them (RT-56572).

        Make test "t/search50.t" always pass on case-insensitive file
        systems rather than just skip VMS.