Almost entirely functional silent shulker boxes

For whatever reason, the shulker box EnumDirection isn't being retrieved properly, so AnyChest will only trigger on shulker boxes that would not be able to open if placed downwards (opening upwards). Silentchest and anychest will work, though.
Suppressed a few deprecation warnings that don't make sense to keep.
If you do use my fork of OpenInv's API, it's not yet stable (specifically, IAnySilentContainer), and will change a little more as I polish things up.

OpenInvPlugin/src/main/java/com/lishid/openinv/OpenInv.java

@@ -107,7 +107,7 @@ public class OpenInv extends JavaPlugin {
         accessor = new InternalAccessor(this);
         // Version check
         if (!accessor.initialize(getServer())) {
-            getLogger().info("Your version of CraftBukkit (" + accessor.getVersion() + ")is not supported.");
+            getLogger().info("Your version of CraftBukkit (" + accessor.getVersion() + ") is not supported.");
             getLogger().info("Please look for an updated version of OpenInv.");
             pm.disablePlugin(this);
             return;

OpenInvPlugin/src/main/resources/plugin.yml

@@ -10,30 +10,30 @@ commands:
     aliases: [oi, inv, open]
     description: Open a player's inventory
     permission: OpenInv.*;OpenInv.openinv
-    usage: |
+    usage: |-
            /<command> - Open last person's inventory
            /<command> <Player> - Open a player's inventory
   openender:
     aliases: [oe]
     description: Opens the enderchest of a player
     permission: OpenInv.*;OpenInv.openender
-    usage: |
+    usage: |-
            /<command> <Player> - Opens a player's enderchest
   searchinv:
     aliases: [si]
     description: Search and list players having a specific item
     permission: OpenInv.*;OpenInv.search
-    usage: |
+    usage: |-
            /<command> <Item> [MinAmount] - Item can be the Item ID or the CraftBukkit Item Name, MinAmount is the minimum amount to be considered.
   silentchest:
     aliases: [sc, silent]
     description: Toggle silent chest function, which hides the animation of a chest when opened or closed, and suppresses the sound.
     permission: OpenInv.*;OpenInv.silent
-    usage: |
+    usage: |-
            /<command> [Check] - Checks whether silent chest is enabled
   anychest:
     aliases: [ac]
     description: Toggle anychest function, which allows opening of blocked chests.
     permission: OpenInv.*;OpenInv.anychest
-    usage: |
+    usage: |-
            /<command> [Check] - Checks whether anychest is enabled