Cleanup work on inventory click handling code, eliminating hard-coded references to inv types, combined a bunch of duplicate code
Merging inv click rewrite work
Merge branch '1.6'
Minor inv click cleanup, merged chest/doublechest instanceof to parent class
Inv contents from block break code cleanup
Merge branch '1.6-MC1.5-Compat' into 1.6
Merge branch '1.6'