Revenge is a dish best served cold, they say, but some like it hot - body hot In ROBIN ANDERSON'S latest foray into sex crime, we cruise downriver from Chelsea Harbour to Canary Wharf and Wapping, where gay gallery owner Raymond Bartholomew stages a spectacular "Revenge" themed art show set up via the Internet. Its sell-out success blesses Raymond and his camp coterie with new horizons, new lovers and new sources of wealth. But before you can say...