This is all done now. Any project or plugin can use the centralised collection of stylesheets.
* Added a match to main/webapp/locationmap-transforms.xml to handle any exslt stylesheet
* The locationmap syntax shown above and on the mail list discussion is incorrect. It is instead, for example:
* Yes, ordinary relative paths do function correctly for importing other stylesheets from those ones.
* See EXSLT example and its related stylesheet at 'forrest seed-sample' site.
* Cleaned up the Baetle plugin to use this system.