Changes to Wikit Revision History between r3 and r4

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].
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-3rsk.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. --> 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.
(blank line)
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.

Legend

     Only in r3
     Only in r4
     -->      Modified slightly between r3 and r4