func Infof(format string, val ...interface{}) error {
	return glg.out(INFO, format, val...)
}
func Infof(format string, val ...interface{}) error {
	return glg.out(INFO, format, val...)
}
func Infof ( format string , val ... interface { } ) error { return glg . out ( INFO , format , val ... ) }
// Infof outputs formatted Info level log
Infof outputs formatted Info level log