- Added Conveyor Tubes - a high speed conveyor system.

- Added Sand and Glass items and recipes to create these.

- Tweaked how water and rivers are generated.

- Fixed problem where map-gen did not always ensure that there is at least one of each deposit type present on map.

- Fixed: Navigation not always updating properly after placing a belt, stair, and possibly other objects.

- Fixed: It was not possible to place a belt ramp over another belt ramp.

- Fixed: Peons could attempt delivery even if they did not reach a building.

- Fixed: Research would not always unlock all buildings related to it.