Change log: https://drive.google.com/file/d/0B6M1O6O65lGTeXB5bDU3WGRwX1k/view?usp=sharing
Also, nonbasic lands (weighted by rarity) now appear in the basic land slot = moar fixing in drafts! I don't want too many 4c decks, though. If this change makes the fixing too abundant, I'll go back to normal.