By Malcolm Herdman Fit for an emperor: Tuscanyy has some wonderful (and unappreciated) stretches of coastline'Dad! Don't be boring!' And with those four words went all hope of us spending our summer holiday in France, idling away the sunshine-filled days on a terrace with a good book, a bottle of local red, some pate and bread for lunch . . . I could go on but I'd probably become boring.'We went