Teddy Bears and Conveyor Belts

After a couple days of work, I managed to complete conveyor belts. Still a few small graphical issues that can be sorted out in the future.

Also made a new product line: teddy bears! Harvest the plush to build thread, fabric, round plushes, long plushes, and finally teddy bears!

Continued implementing a save/load system and the ability to have multiple factories. Saving works well, loading works but with one bug, but I can't figure it out yet.