0.8alpha.0.36:

0.8alpha.0.36:
	A little tender loving care, applied to conditions:
	... make the implementation of DEFINE-CONDITION agree with the
		documentation string: allow :DOCUMENTATION slot options
		to work.
	... ANSI (and pfdietz :-) wants SLOT-EXISTS-P to work on
		conditions; hook condition objects into CLOS enough to
		talk about existence of slots: (new classes
		CONDITION-{EFFECTIVE,DIRECT}-SLOT-DEFINITION,
		CONDITION-CLASS, etc)
	... it's a bit ridiculous to have SLOT-EXISTS-P working on
		conditions, and then not be able to do SLOT-VALUE, so
		do the work necessary to make CONDITION objects
		more-or-less fully understood by PCL: (new methods on
		COMPUTE-SLOTS, ALLOCATE-INSTANCE, SLOT-VALUE-USING-CLASS
		and friends; new clauses in internal functions such as
		GET-OPTIMIZED-STD-SLOT-VALUE-USING-CLASS-METHOD-FUNCTION;
		adjustment of the braid to set up CLOS knowledge of the
		new class hierarchy).