One of the most versatile pieces you can add to your wardrobe now Spring is here (ahem – yes it is snowing outside the window as I write this – but it’s March, and that means Spring to me.) is a duster jacket. Lightweight, but so elegant and stylish, a duster jacket is a great with jeans and flat shoes for a casual look,  but can also be worn, 1960s style, over a shift dress for a more dressy, or evening look. One of the best value duster jackets around at the moment is the F&F version that comes in a very pretty and springlike dusky pink shade. With mid…