November 2017 (Week 1)
+ implemented rivers
+ fps loss (from 100 to 30) due horizontal cuts(solved bug 100 + fps)
+ camera culling based on camera height
+ water blocks (art)
+ implemented horizontal cuts just like in dwarf fortress.
+ surface holes leading all the way to the bottom. (solved bug)
- Rivers need curves
- BlockSorter needs to be less random.