Changes to "Wikit Revision History" between r8 and r9

Changes to Wikit Revision History between r8 and r9

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].
(blank line)
This has only been tested with the CGI interface.

Legend

     Only in r8
     Only in r9
     -->      Modified slightly between r8 and r9