Move WorldExceptionSet from Faction to MassiveCore. Closes MassiveCraft/MassiveCore#197.

src/main/java/com/massivecraft/massivecore/collections/WorldExceptionSet.java

@@ -0,0 +1,32 @@
+package com.massivecraft.massivecore.collections;
+
+import org.bukkit.World;
+
+import com.massivecraft.massivecore.CaseInsensitiveComparator;
+
+public class WorldExceptionSet
+{
+	// -------------------------------------------- //
+	// FIELDS
+	// -------------------------------------------- //
+	
+	public boolean standard = true;
+	
+	public MassiveTreeSet<String, CaseInsensitiveComparator> exceptions = new MassiveTreeSet<String, CaseInsensitiveComparator>(CaseInsensitiveComparator.get());
+	
+	// -------------------------------------------- //
+	// CONTAINS
+	// -------------------------------------------- //
+	
+	public boolean contains(String world)
+	{
+		if (this.exceptions.contains(world)) return !this.standard;
+		return this.standard;
+	}
+	
+	public boolean contains(World world)
+	{
+		return this.contains(world.getName());
+	}
+
+}