modified:   lib/t2l-lib/screamer+.lisp
	modified:   lib/t2l-lib/t2l-screamer.lisp

screamer+ set / bag function in pcset=v (http://web.archive.org/web/20050609081454/http://www.csd.abdn.ac.uk/~tnordlan/PhD_Timetable/Programs/LISP/more%20Lisp/screamer+.lisp)