Self-confessed Rangers fan Neil Warnock has hauled Aberdeen into a Scottish Premiership relegation battle, according to former Ibrox winger Neil McCann. The experienced English Football League manager, 75, is still without a Scottish Premiership victory at Pittodrie in what is his first job in Scottish football. Neil Warnock has routinely appealed for the opportunity to manage in Scotland and the appointment drew huge press interest north and south of the border. But since replacing Barry Robson at Aberdeen, Neil Warnock has taken Rangers’ northeast rivals deeper into the mire and – naturally …