weefbellington/screenplay — pull request #55 by weefbellington (2014-11-18 19:38:39+00:00)
Title: Don't tear down the outgoing scene when using a StackRigger

When using a StackRigger, Screenplay was calling tearDown on the outgoing scene even though it remained attached to the screen. Now we check if a Scene has been detached by the rigger before calling tearDown.