Update from upstream SpigotMC

Add unbreakable API to item meta SpigotMC/Spigot@b1af008222
Configure how often EntityHangings calculate if they should die. SpigotMC/Spigot@ac6e1fc32d
Copy ItemStacks in DataWatcher to prevent ConcurrentModificationExcep… SpigotMC/Spigot@2af28ffbd1
Add the spigot.yml into the timings paste SpigotMC/Spigot@d61f38bd58

Note: This commit moves the entity-hanging tick into Spigot's spigot.yml and out of our paper.yml

Bukkit-Patches/0030-Added-isUnbreakable-and-setUnbreakable-to-ItemMeta.patch

@@ -0,0 +1,46 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: libraryaddict <redwarfare@live.com>
+Date: Fri, 22 Aug 2014 05:31:04 -0400
+Subject: [PATCH] Added isUnbreakable and setUnbreakable to ItemMeta
+
+
+diff --git a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
++++ b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
+@@ -0,0 +0,0 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable {
+     */
+     boolean hasConflictingEnchant(Enchantment ench);
+ 
++    // Spigot start
++    public class Spigot
++    {
++
++        /**
++         * Sets the unbreakable tag
++         *
++         * @param unbreakable true if set unbreakable
++         */
++        public void setUnbreakable(boolean unbreakable)
++        {
++            throw new UnsupportedOperationException( "Not supported yet." );
++        }
++
++        /**
++         * Return if the unbreakable tag is true
++         *
++         * @return true if the unbreakable tag is true
++         */
++        public boolean isUnbreakable()
++        {
++            throw new UnsupportedOperationException( "Not supported yet." );
++        }
++    }
++
++    Spigot spigot();
++    // Spigot end
++
+     @SuppressWarnings("javadoc")
+     ItemMeta clone();
+ }
+--