AMMAN (Reuters) - Rebels seized a town in an eastern oil-producing province of Syria 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. ...