Just a quickie today, but one of the things you'll want to do in Swift playgrounds is load resources (often from the "main" project). It wasn't immediately obvious how to do it.
First make sure you have the File Inspector visible (View->Utilities->Show File Inspector) for the playground, then follow the steps below. I've used an absolute path because the Oyster framework we are building doesn't have any pictures but you can have paths relative to the Playground, or even INSIDE the playground (the playground is a bundle). Very very nice.