cleanups - move UNION-STREAM comments into documentation file
Removed: FUNCTIONAL-SETF-TEST, CLASS-PROTOCOL-TEST
TEST: define %accessors for SETUP-FUNCTION, CLEANUP-FUNCTION slots. TEST-SETUP-FUNCTION, TEST-CLEANUP-FUNCTION: Use %accessors when applicable
define a SETF generic function for TEST-SETUP-FUNCTION, TEST-CLEANUP-FUNCTION
update documentation
update documentation