Tweak Caveworld Dimensions

- Disable mineshafts from both, as these should be unexplored caverns, and mineshafts just don't seem to fit.
- Lakes won't generate in the Caveworld, as they make more sense in the Deep Caveworld alongside the undercaves.
- Animal spawners are enabled in the Deep Caveworld as a reward for reaching that far, and finding one.
- Vines won't generate in the Deep Caveworld as plant life wouldn't really survive that far down.