DUSHANBE, Tajikistan — A Jan. 2 earthquake that struck a mountainous region of Tajikistan has left hundreds, perhaps thousands, of villagers homeless in bitter winter weather, Southern Baptist humanitarian workers in Central Asia report. The 5.3-magnitude quake struck in Gorno-Badakhshansky, the same area hit hard by a tremor in 2009. Southern Baptist relief work from the earlier earthquake is still…