Sensible birds fly to the warmth in the winter. Humans, not being birds and not always sensible, have to make special plans to escape the cold. Sensible music-lovers can fly to Townsville for the Australian Festival of Chamber Music (July 31-August 8). The programing is varied and of high quality, presented, in the words of Artistic Director, Piers Lane, by ‘personable, top drawer performers….in