LONDON (Reuters) - The upcoming Simpsons movie takes a typically irreverent dig at religion and environmentalists, and features a nude scene involving 'toon teen Bart that had the audience at a preview show applauding. A 10-minute clip from "The Simpsons Movie," the first time Homer, Marge, their family and friends have made it to the big screen, was shown in London late on Wednesday ahead of its release worldwide later in July. The clip offered several clues as to the plot, suggesting that the environment and religion would me a major themes. Rock band Green Day is booed and pelted...