LONDON (Reuters) - World markets looked to have overcome their new year wobbles on Thursday, as the United States and Iran backed away from conflict in the Middle East.Asia's best day in weeks and a strong European open pushed the main global stocks index back towards a record high. Traders also moved out of their shelters in the Japanese yen, gold and government bonds.Iran fired missiles at military bases housing U.S. troops in Iraq on Wednesday in retaliation for a U.S. drone strike that..