Evolution BY SHERMAN ALEXIE Buffalo Bill opens a pawn shop on the reservation right across the border from the liquor store and he stays open 24 hours a day, 7 days a week and the Indians come running in with jewelry television sets, a VCR, a full-length beaded buckskin outfit it took Inez Muse 12 years to finish. Buffalo Bill takes everything the Indians have to offer, keeps it all catalogues and