NYT Cooking: Sticky, spicy and full of cranberries, this gingerbread is perfect for the holidays. The recipe has been designed to make ahead, and will taste as good 2 days after baking as it does on the same day. (It will keep for 4 to 5 days.) To store it, wrap it well, stick it in the fridge and then bring to room temperature before serving. Whipped cream or crème fraîc...