Reworked quern processing for food so it handles weight in recipe.#781

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pgelinas wants to merge 3 commits intoDeadrik:masterfrom pgelinas:master

+64-45

Commits on Aug 4, 2015

Extracted constant for NBT tags and added method to check existence.
pgelinas
committed

Commits on Aug 5, 2015

Reworked quern processing for food so it handles weight in recipe.
pgelinas
committed
Fixed bug with decay on tossed stack from quern not present.
pgelinas
committed