* Fixed some issues/weirdness with chest based structures (Trommel, Lumber Mill, Granary). They should now function properly.
* There is a known issue with the trommel, it will stop working when the chunk is unloaded. After the chunk is reloaded it should start again(sometimes takes a while).
* Fixed trade income not being accumulated for all trade goods.
* Fixed trade income being miscalculated.
* Fixed some issues with timers causing the lumber mill to spaz out.
* Structures now have upkeep costs.
* Structures now have construction costs. (undo will refund the cost)