Wiki Rich Content document embeds now work for nodeRefs of the format ?nodeRef=workspace:/SpacesStore (single slash) which seem to be output in 4.2.d.

Also do not require leading forward slash and make regexp expression case-insensitive.
Fix Google Code issue 123 reported by Richard Esplin - URL-decode slashes and colons in document-details URLs
Make custom page template for loading doc previews compatible with 4.2.c