Biogenerator improvements.

- Lower the process noise.
- Add a new Creative Common sound to play once the process is done.
- Add options for **5** slabs of meat or units of milk to be dispensed at once. Because seriously who is going to use this feature as is.
- Add the option to create plant bags. Much more useful than most other stuff.
- Add large plant bags for easier ferrying of goods.
- Add a description to the biogenerator.
- Fix a typo resulting in "]The the biogenerator is already loaded."
- Add cream dispensing.

code/game/objects/items/weapons/storage/bags.dm

@@ -170,6 +170,10 @@
 	w_class = ITEMSIZE_SMALL
 	can_hold = list(/obj/item/weapon/reagent_containers/food/snacks/grown,/obj/item/seeds,/obj/item/weapon/grown)
 
+/obj/item/weapon/storage/bag/plants/large
+	name = "large plant bag"
+	w_class = ITEMSIZE_SMALL
+	max_storage_space = ITEMSIZE_COST_NORMAL * 45
 
 // -----------------------------
 //        Sheet Snatcher