Add back hopper tick scheduling

Tick a hopper only if certain conditions have changed i.e. inventory changes, redstone updates, etc.

CraftBukkit-Patches/0010-View-Distance.patch

@@ -1,4 +1,4 @@
-From 3851ac651a87a6d9241935fe20db52f031ba2b7b Mon Sep 17 00:00:00 2001
+From 8eceef159a4bb5b2d8f481611a996f59b05b2cd2 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Sat, 23 Mar 2013 09:52:41 +1100
 Subject: [PATCH] View Distance
@@ -35,10 +35,10 @@ index 03cac6e..b245159 100644
          this.chunkProvider = this.k();
          this.Q = new org.bukkit.craftbukkit.CraftTravelAgent(this); // CraftBukkit
 diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java
-index 1545a61..6cc3a91 100644
+index 7322703..a3255eb 100644
 --- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
 +++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
-@@ -124,4 +124,11 @@ public class SpigotWorldConfig
+@@ -126,4 +126,11 @@ public class SpigotWorldConfig
          expMerge = getDouble("merge-radius.exp", 3.0 );
          log( "Experience Merge Radius: " + expMerge );
      }