Update from version 1.0.19 to 1.0.21.  Changes:

1.0.21 2008-07-24T08:33:00
        - Fix hard tabs in Changelog
        - Add unit test for core dumps issue from RT#36203
        - Fix POD spelling.
        - Fix warning from RT#34856.
        - Add test for another tab width issue (related to <hr> generation)
          from RT#37769. Fix this issue.
        - More test additions and more splitting the test suites into MDTest
          modules.

1.0.20 2008-07-11T23:30:00
        - Update README.txt
        - Allow scripts to be used on multiple input files at once (processing
          in command line order)
        - Update footnote behavior of Text::MutliMarkdown to be consistent
          with the latest version of MultiMarkdown
        - Added tests for the new footnote functionality.
        - Added tests for all the MDTest corner cases brought up on the list.
          Noted why / how I differ from original Markdown.
        - Moved all the document tests to MDTest format. I have made MDTest
          test suites for Text::Markdown and Text::MultiMarkdown, containing
          **only** the bug fixes and behavior changes I've made, I've imported
          the Markdown test suite from MDTest1.1, and the MultiMarkdown test
          suite.
        - RT#36537 doc patch to add POD to the scripts from Debian's Gunnar
          Wolf.
        - Mutilate the list processing somewhat to reduce the compilation
          of recursive regexes, and so stop perl (<5.10) crapping itself
          on lots of input. This isn't the full fix - really shouldn't be
          usng recursive regexes at all. RT#37297

(he)