AMMAN (Reuters) - Syrian rebels seized a town in an eastern oil-producing province on Thursday after three days of heavy fighting in which 30 Nusra Front fighters and 100 Syrian troops were killed, a violence monitoring group said. Taking Shaddadeh in Hasakah province from the forces of President Bashar al-Assad brings the rebels closer to the provincial capital Hasakah, 45 km (30 miles) to the north. ...