Added .item:serializer module to automatically load and save item objects.

Added parsers:
- [EnchantmentParser](item/serializer/src/main/java/it/angrybear/serializers/EnchantmentParser.java);
- [ItemParser](item/serializer/src/main/java/it/angrybear/serializers/ItemParser.java);
- [ShapeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapeParser.java);
- [ShapedRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapedRecipeParser.java);
- [ShapelessRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapelessRecipeParser.java);
- [FurnaceRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/FurnaceRecipeParser.java).
Added [YAGLParser](item/serializer/src/main/java/it/angrybear/serializers/YAGLParser.java) to automatically load parsers.
Added **MovablePersistentItem** to allow moving inside the player inventory.
Moved everything to package `it.angrybear.yagl`.
Reworked `Item#copy()` method: it will try to get a default empty constructor from the current class. If it fails, it defaults to `ItemImpl`.
Fixed `Item#copy(Class)` with automatic resolution of interfaces: passing `Item` or `BukkitItem` will convert them into `ItemImpl` and `BukkitItemImpl`.
Fixed `Item#copy(Class)` not checking if current item has field of receiving class.
Fixed various bugs in **ShapedRecipe**.
Fixed recipes not copying items in their most default state (Item).
Fixed invalid casts to `BukkitItem` in `ItemUtils`.
Fixed `ItemUtils`: now it will apply model data only for values higher than 0.
Fixed visibility issues in `PersistentListener`: every event method is now protected.
Fixed PersistentListener with delay system.
Updated FulmiCollection to version 1.4.1.

Author: fulminazzo

build.gradle

@@ -6,7 +6,7 @@ plugins {
 }
 
 group = 'it.angrybear'
-version = '2.0'
+version = '2.1'
 
 allprojects {
     apply plugin: 'java-library'

item/bukkit/src/main/java/it/angrybear/yagl/items/MovablePersistentItem.java

@@ -0,0 +1,7 @@
+package it.angrybear.yagl.items;
+
+/**
+ * An implementation of {@link PersistentItem} that allows to be moved inside the player's inventory.
+ */
+public class MovablePersistentItem extends PersistentItem {
+}

item/bukkit/src/main/java/it/angrybear/yagl/listeners/PersistentListener.java

@@ -1,5 +1,6 @@
 package it.angrybear.yagl.listeners;
 
+import it.angrybear.yagl.items.MovablePersistentItem;
 import it.angrybear.yagl.items.PersistentItem;
 import it.angrybear.yagl.persistent.DeathAction;
 import org.bukkit.entity.Player;
@@ -16,6 +17,7 @@
 import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.event.player.PlayerItemConsumeEvent;
 import org.bukkit.event.player.PlayerItemDamageEvent;
+import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.PlayerInventory;
 import org.jetbrains.annotations.NotNull;
@@ -102,8 +104,17 @@ protected void on(PlayerDropItemEvent event) {
     protected void on(InventoryClickEvent event) {
         Player player = (Player) event.getWhoClicked();
         ClickType type = event.getClick();
-        if (clickPersistentItem(event.getCurrentItem(), player, type, cancelled(event))) return;
-        clickPersistentItem(event.getCursor(), player, type, cancelled(event));
+        ItemStack itemStack = event.getCurrentItem();
+        Inventory clicked = event.getClickedInventory();
+        Inventory playerInventory = player.getInventory();
+
+        Consumer<PersistentItem> ifPresent = e -> {
+            if (!(e instanceof MovablePersistentItem) || !playerInventory.equals(clicked))
+                cancelled(event).accept(e);
+        };
+
+        if (clickPersistentItem(itemStack, player, type, ifPresent)) return;
+        clickPersistentItem(event.getCursor(), player, type, ifPresent);
     }
 
     @EventHandler