Test with stuff + Forestry potential support

BM_src/forestry/api/storage/IBackpackInterface.java

@@ -0,0 +1,19 @@
+package forestry.api.storage;
+
+import net.minecraft.item.Item;
+
+public interface IBackpackInterface {
+
+	/**
+	 * Adds a backpack with the given id, definition and type, returning the item.
+	 * 
+	 * @param itemID
+	 *            Item id to use.
+	 * @param definition
+	 *            Definition of backpack behaviour.
+	 * @param type
+	 *            Type of backpack. (T1 or T2 (= Woven)
+	 * @return Created backpack item.
+	 */
+	Item addBackpack(int itemID, IBackpackDefinition definition, EnumBackpackType type);
+}