0.7.13.pcl-class.4

0.7.13.pcl-class.4
	Fix CONDITION-CLASS regression from ansi-tests
	... many thanks to Gerd Moellmann
	... delete dead *FIND-STRUCTURE-CLASS* variable
	... some parallel code for CONDITION-CLASS(OID) stuff
	... frob ENSURE-CLASS-VALUES slightly to ensure it doesn't
		automatically add on :DIRECT-SLOTS
	Go back to not printing IDENTITY for named objects
	... i.e. #<STANDARD-CLASS FOO> is enough, because there will
		only ever (we hope) be one standard-class named FOO.