* Changed my water animation shader to use the vertex shader for animation instead of the geometry shader, because it was of course unnecessary. Finally got around to fixing it.

* While I was at it, I changed so that I can tweak the water height through settings, and generate stuff like completely water-covered worlds.

* Also had to change a little in terrain generator to make sure that terrain generation doesn't poop out if it can't place objects (it only places objects above water level!)