more bug fixes

hey guys. i fixed a few things for you.

- i finally went ahead and gave the ice block, snowy grass blocks, snowy dirt, and gold bricks a proper loot table

- i updated the dropped ice block item texture to the newer-ish one. i still think they're both ugly though

- fixed normal stalagmites and stalactites from thinking they're mushrooms (fungus spreading is ironic)

- fixed the snowy grass from eating up your entire inventory after breaking one (hopefully at least)

- snowy tree stumps and logs weren't dropping sticks, but they are now after a threat or two

when i get around to it, i plan on making the water physics slower. right now it's pretty strange to play around with in-game.