TRIPOLI, Lebanon (Reuters) - The guns are silent and fighters have disappeared from the streets of the north Lebanese city of Tripoli but the battle that flared last month, killing 16 people, is far from over. Unrest in neighboring Syria, where 27,000 people have been killed in a conflict that is becoming increasingly sectarian, is deepening tensions between Tripoli's Sunni Muslim majority and Alawite minority. Feuds between the two communities, which pre-date Lebanon's 1975-1990 civil war, fester beneath the daily bustle in shops and restaurants. ...