Refactored StorageChannel enum into an interface (#3138)

This replaces the static enum with a more dynamic interface providing
factory methods for handling network storage.

src/main/java/appeng/util/item/ItemModList.java

@@ -23,6 +23,7 @@ import java.util.Collection;
 
 import appeng.api.AEApi;
 import appeng.api.config.FuzzyMode;
+import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IItemContainer;
 
@@ -31,7 +32,7 @@ public class ItemModList implements IItemContainer<IAEItemStack>
 {
 
 	private final IItemContainer<IAEItemStack> backingStore;
-	private final IItemContainer<IAEItemStack> overrides = AEApi.instance().storage().createItemList();
+	private final IItemContainer<IAEItemStack> overrides = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
 
 	public ItemModList( final IItemContainer<IAEItemStack> backend )
 	{