This is a bugfixes only update:
* Reverted mob spawning back to the old code, it was far to annoying. I have plans on what to do with this.
Forgot to say, thanks for the nice comments.
I've been thinking about what to do next and I've thought about a better looking solution to "supporting" my greenhouse, but it would require changing the minecart tracks and walkway on the ground and I'd hate to just tear down hundreds of stone blocks that took so much coal to get in the first place.