Changes

Summary

1. Fix #41 Crash when an item in an itemStack is null (commit: f1e4916) (details)

Commit f1e491647b814cdee619a82ea1ded4e12451252f by mezz Fix #41 Crash when an item in an itemStack is null (commit: f1e4916)
	src/main/java/mezz/jei/util/StackUtil.java (diff)
	src/main/java/mezz/jei/RecipeRegistry.java (diff)
	src/main/java/mezz/jei/plugins/vanilla/crafting/ShapedOreRecipeHandler.java (diff)
	src/main/java/mezz/jei/plugins/vanilla/crafting/ShapelessOreRecipeHandler.java (diff)
	src/main/java/mezz/jei/util/NullItemInStackException.java
	src/main/java/mezz/jei/plugins/vanilla/crafting/ShapelessRecipesHandler.java (diff)
	src/main/java/mezz/jei/plugins/vanilla/furnace/FuelRecipeHandler.java (diff)
	src/main/java/mezz/jei/plugins/vanilla/furnace/SmeltingRecipeHandler.java (diff)
	src/main/java/mezz/jei/api/recipe/IRecipeHandler.java (diff)
	src/main/java/mezz/jei/plugins/vanilla/crafting/ShapedRecipesHandler.java (diff)