By TOMI KILGORE And TOMMY STUBBINGTON Join Our Free Newsletter Jan. 13, 2014 8:27 a.m. ET NEW YORK—U.S. stock futures slipped, extending the lackluster start to the year, as investors continued to digest Friday’s weaker-than-expected jobs report.In Europe, stocks nudged higher, helped by strength in banking shares after regulators agreed to soften the terms of a rule meant…