py[BF/NF/RF] simplify programming semantics for running bayes, and add cmd line switch
py[BF/NF/RF] simplify programming semantics for running bayes, and add cmd line switch

esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x