Now, everywhere you turn around town, the zinc-and-copper one-cent piece is taking it on the chin: Shoved out of the economic picture by charge cards. Flung into the trash by people who think it’s mucky and worthless. Hijacked by cashiers who assume you’re among the 27 percent of Americans who don’t even keep track of their loose change, according to a May 2005 survey conducted by Coinstar, providers of the self-service machines that help convert coins into paper money. . . .