VanillaDev/Vanilla — pull request #292 by R-T-B (2012-08-16 03:43:39+00:00)
Title: Fixed many block drops to match vanilla gameplay

Many common items, such as grass, did not clear the default drop table
before adding their actual drop (dirt in grass's case) I fixed such
errors where neccesary, and added approprate drop "clear" and "add"
methods to all of the files in this commit (including adding special
VanillaMaterials for SilkTouch, may have missed a few, check).