Changes to Wikit Revision History between r9 and r10

Small patch to enable revision history to be stored in the Wikit TKD file [http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-3rsk.diff]. --> Small patch to enable revision history to be stored in the Wikit TKD file.
This has only been tested with the CGI interface.
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'''Cumulative Patches'''
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-1rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-2rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-3rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-4rsk.diff
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'''Incremental Patches'''
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-3_to_4rsk.diff
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Legend

     Only in r9
     Only in r10
     -->      Modified slightly between r9 and r10