Sulphur ore generation

There's a lot of tweaking I'd like to do, but I think this is a pretty good result for a first try.

I tried using WorldGenMinable to generate the clusters of ore, but it had a habit of spawning 6-7 blocks away from the lava.

I'm not quite game enough to put in the configuration options myself yet as I'm still trying to get a feel for your coding style before I try doing infrastructural. I have however declared the configurable settings as variables at the top of the method.
How would you handle this as a generic:
```return Float.compare(vector.x, x) == 0 &&
                Float.compare(vector.y, y) == 0 &&
                Float.compare(vector.z, z) == 0;```