Includes updates to the flash slideshow, packaging of Wikis, and usage of HTML head tags in some places.

Gotchas:

   * The ukplayer example, slideshow.html in /extras/ukplayer, used
     to be loaded with a javascript called AC_RunActiveContent.js. 
     This file is removed due to licencing issues. If you use this 
     script in custom HTML, you should replace it with swfobject.js 
     as is demonstrated in the new example slideshow.html file.

Changelog:

 - fixed: ukplayer example is now loaded with swfobject.js released under the
          MIT licence, see gotcha's and /extras/ukplayer
 - fixed #9264: new slideShow.swf uploaded in extras/ukplayer (United Knowledge/Arjan Widlak)
 - fixed #9428: added code to ASSET::get to include keywords when no property name is requested
 - marked sbin scripts as executable
 - fixed #9492: Problem in passing form variables to Macro SQL inside a snippet
 - fixed #9404: Head tags for admin user with admin mode off
 - fixed #9507: Navigation: relDepth is calculated with starting point, instead of the first displayed page
 - fixed a bug where no Payment Gateway labels show up when checking out.
 - fixed #9511: Subcategories displayed incorrectly (Henry Tang, Long Term Results B.v.)
 - fixed #4137: Calendar Search page has head tags in body
 - fixed: HTTP Proxy doesn't serve new content to visitors
 - fixed: Exporting to static files can leak large amounts of memory