Changes to Wikit Revision History between r4 and r15

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-revisions-1rsk.diff]. --> Small patch to enable revision history to be stored in the Wikit TKD file.
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This has only been tested with the CGI interface.
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I also created another small patch [http://www.rkeene.org/projects/info/resources/projects/wikit/style/wikit-style-4rsk.diff] that allows you to use a style-sheet, and the CGI without a wrapper CGI.  Just name the style sheet "wikit.css" and put it in the same directory as the CGI.

This patch is probably used in conjunction with the BetterCSS patch [http://www.rkeene.org/projects/info/resources/projects/wikit/style/wikit-bettercss-1rsk.diff] to give more control over various elements.
'''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
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-5rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-6rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-7rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-8rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-9rsk.diff
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'''Incremental Patches'''
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-3_to_4rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-4_to_5rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-5_to_6rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-6_to_7rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-7_to_8rsk.diff
   * http://www.rkeene.org/projects/info/resources/projects/wikit/revisions/wikit-revs-8_to_9rsk.diff

Legend

     Only in r4
     Only in r15
     -->      Modified slightly between r4 and r15