Striker Callum Osmand aims to continue to repaying Martin O'Neill's faith in him after a "whirlwind" first year at Celtic.Osmand, 20, was signed from Fulham by Brendan Rodgers last summer but didn't make his debut until O'Neill's first interim spell in October.He then scored in the League Cup semi-final victory over Rangers and started the Europa League victory at Midtjylland, but suffered a serious hamstring injury in that game and spent six months out.The striker returned just in time for the