Actress Janet Leigh, whose gruesome and bloody murder in Alfred Hitchcock's "Psycho" scared millions of female moviegoers out of the shower, died yesterday at her Beverly Hills home. She was 77. Leigh had been battling vasculitis, an inflammation of the blood vessels, for a year. "She died peacefully, surrounded by her family," including actress-daughters Jamie Lee and Kelly Curtis, said Heidi Schaeffer, Jamie Lee Curtis' spokeswoman. Born Jeanette Helen Morrison to parents who often moved from town to town, Leigh was "discovered" when MGM's Norma Shearer saw her picture at the front desk of a California ski resort, where her...