Hidden config and use of NullChunkletManager

ChunkletManagerFactory now produces NullChunkletManagers if Chunklets are disabeld in the hidden.yml

src/main/java/com/gmail/nossr50/config/HiddenConfig.java

@@ -0,0 +1,44 @@
+package com.gmail.nossr50.config;
+
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import com.gmail.nossr50.mcMMO;
+
+public class HiddenConfig extends ConfigLoader {
+    private static String fileName;
+    private static HiddenConfig instance;
+    private static YamlConfiguration config;
+
+    private static boolean chunkletsEnabled;
+
+    public HiddenConfig(mcMMO plugin, String fileName) {
+        super(plugin, fileName);
+        HiddenConfig.fileName = fileName;
+    }
+
+
+    public static HiddenConfig getInstance() {
+        if (instance == null) {
+            instance = new HiddenConfig(mcMMO.p, "hidden.yml");
+            instance.load();
+        }
+
+        return instance;
+    }
+
+    @Override
+    protected void load() {
+        if(plugin.isInJar(fileName)) loadKeys();
+    }
+
+    @Override
+    protected void loadKeys() {
+        config = YamlConfiguration.loadConfiguration(plugin.getResource(fileName));
+
+        chunkletsEnabled = config.getBoolean("Options.Chunklets", true);
+    }
+
+    public boolean getChunkletsEnabled() {
+        return chunkletsEnabled;
+    }
+}