* commit '821ec8edeee7d59396cbee3a370e5cf3d6c7b8b6': Cherry pick from Honeycomb Change ID I8d57d12828afab700d76f9b19195817a0adfe080 IAB docs: adds best practices for pending transaction UI
* commit '821ec8edeee7d59396cbee3a370e5cf3d6c7b8b6': Cherry pick from Honeycomb Change ID I8d57d12828afab700d76f9b19195817a0adfe080 IAB docs: adds best practices for pending transaction UI