0.7.3.5:

0.7.3.5:
	Port fix to PCL due to Pierre Mai regarding MAKE-INSTANCES-OBSOLETE
		in the fast path
	New, slightly less bogus transforms for bitvector operations
	... now we can deal with bitvectors with lengths close to
		ARRAY-DIMENSION-LIMIT
	Also write tests for both of these (thanks again to Pierre Mai)