Kolkata: Former India captain Sourav Ganguly today returned as the Kolkata Knight Riders` skipper for next year`s Indian Premier League, replacing New Zealand`s Brendon McCullum. The controversy-ridden IPL outfit, which finished at the bottom of the table this year, also named Dav Whatmore as its new coach with Delhi Ranji coach Vijay Dahiya as his deputy. Pakistani pace legend Wasim Akram was app