After years of scolding documentaries warning how terrible things are in the world comes Tom Shadyac’s “I Am,” which opens today. It’s not only upbeat and enjoyable, it also offers a measure of hope.What business does Shadyac, who directed “Ace Ventura: Pet Detective,” “Liar Liar” and “Bruce Almighty,” have in making a documentary about fixing a broken planet?It turns out, all the business in the world. Read More