Refactored AEConfig (#2633)

Added a singleton getter instead the public field.
Reduced all fields to private.
Replaced field access with getters.
Added setters where necessary (Dimension/Biome Registration)
Added config options to disable more features.
Splitted Enum name from the config key.
Changed FacadeConfig and Networkhandler similar to AEConfig.init().

src/main/java/appeng/block/crafting/ItemCraftingStorage.java

@@ -45,6 +45,6 @@ public class ItemCraftingStorage extends AEBaseItemBlock
 	@Override
 	public boolean hasContainerItem( final ItemStack stack )
 	{
-		return AEConfig.instance.isFeatureEnabled( AEFeature.EnableDisassemblyCrafting );
+		return AEConfig.instance().isFeatureEnabled( AEFeature.ENABLE_DISASSEMBLY_CRAFTING );
 	}
 }