detect the presence of uuid/uuid.h and also detect the right version of xerces. Removed as many references to XERCESCROOT as possible (all of them, I believe). svn path=/trunk/; revision=10144
detect the presence of uuid/uuid.h and also detect the right version of xerces. Removed as many references to XERCESCROOT as possible (all of them, I believe). svn path=/trunk/; revision=10144