iPhone 5 support

Added an iPhone 5 splash screen, along with code changes to make UI
elements render correctly on the larger screen resolution.

Note: I added a hack to DetailViewControllerIPhone.mm
+                //iPhone Simulator doesn't send screen rotations in 4-inch mode, so here is a hack to fix UI elements there:
 	 4169	
+                [self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortrait];

The comment is actually incorrect. Rotation appears to be broken on all iPhone/iPod devices in the current code. You can probably remove that hack when rotation is fixed.