If François Hollande has styled himself as Mr Normal – recently photographed buying fruit compote in a Paris supermarket and saying he would continue to do so after he's elected "if the fridge is empty" – his partner, Valérie Trierweiler, could revolutionise the unofficial role of France's first lady. If, as she has promised, the 46-year-old journalist keeps her contract for the magazine Paris Match and continues to work, it would be the first time a president's partner has held down a regular job and salary. Her role as a journalist would make this juggling act even more tricky. For...