modified:   Util.hs
        added exception catching:
	modified:   Hgen.hs
	modified:   testground.hs
	modified:   Hgen.hs
	modified:   testground.hs
	modified:   Hio.hs
	modified:   testground.hs
	modified:   KBio.hs
        change module name: Triv -> UtilB
	modified:   Hgen.hs
	modified:   Hio.hs
	modified:   Util.hs
	renamed:    Triv.hs -> UtilB.hs
	modified:   testground.hs
        Added KB init UC
	modified:   Hgen.hs
	modified:   Hio.hs
	modified:   testground.hs
	modified:   Hio.hs