[2020] Add Weather Effects and Sunsets

Gameplay effects for this system:

-Rain: Waters crops and speeds up their growth rate, puts out fires (instances with the buff Burn)

-Lightning: Occasionally hits structures, powering them with the Industrious buff (Application example in objChooseBoon User Event 0, at line 21)

-Snow:

-Dust:

-Fire/Smoke:

-Coin Rain: Should be super rare, something like 1% chance. Affects all biomes, while active coins randomly spawn on the map and players have the Greedy potion buff