Some semi-random thoughts on terrain generation

[xoft]

It's gonna take time to implement, don't get your expectations too high

I'm equally excited about biomes as about other generator-related things:
- MC-like caves (finally)
- dungeons (possibly even with spawners)
- villages (yay
- fortresses (if popular by demand)
- the Nether (maybe)
- the Aether (very maybe