Add Scalable/Tossable interaction demos and fix bug in Tossable state reporting.
Summary: Tossable was reporting an at rest state when draggable finished due to the state pool drying up before the spring interaction had a chance to start. By observing the spring's state first and draggable's state last, we ensure that the state pool maintains an active state across the hand-off.
Tags: Material Motion
Differential Revision: http://codereview.cc/D2885