Everyone knows the traditional reasons why Maine is a great place to take a vacation - it has ocean, mountains, lakes and lobsters.Now the state is promoting one more inducement for people to visit: No smoking is allowed in Maine's public buildings.The state is putting up five signs at various points this week along the Maine Turnpike and Interstate 95 that advertise the fact."Breathe easy, you're in Maine," said the blue signs with white lettering. "All indoor public places are smoke-free."Dr. Dora Anne Mills, who heads the Maine Center for Disease Control and Prevention, said Maine may be "the...