TUNIS (Reuters) - Two years on, the euphoria has long gone. The flame of revolt that first flared in Tunisia, previously one of the Arab world's quietest corners, consumed autocrats there, in neighboring Egypt and, more violently, in Libya. Contained in Bahrain, it flickered on in Yemen where in time a veteran leader was pushed aside. In Syria, it is still being fiercely fought over. All Arab countries have felt the heat. ...