Is it possible to demolish a building once built? I remember in the demo there was a greyed-out button under the building list which did nothing, and now in the release there's no button there at all. I've noticed you can click on a building icons and they grey out and the building releases a puff of smoke and a crash noise, but next turn the building is still there, draining resources. Is there any way to demolish a building without razing the entire town?