Marketplace: Scott Jagow: In Davos, Switzerland, they’re wrapping up the World Economic forum. Today, the head of Royal Dutch Shell met with Nigeria’s president to talk about security and oil. Shell’s CEO is Jeroen Van der Veer. He told his employees something this week that might surprise you: World demand for oil and gas will outstrip supply within seven years. Our European correspondent, Stephen Beard, joins us now. Seven years? That’s a lot sooner than we’ve heard before, isn’t …