0.9.9.27:

0.9.9.27:
	Fix most use of slot-names colliding with external symbols /
	symbols accessible from CL-USER
	... prefix most such slots by %;
	... rename METHOD-COMBINATION-TYPE to -TYPE-NAME (as in AMOP
		FIND-METHOD-COMBINATION)
	... only the TYPE slot in SPECIALIZER left to go, which is more
		complicated because in fact it's not a TYPE at all; more
		like a specifier (or maybe a typeoid)