Server-side multiworld support with several improvements overal.

src/main/java/org/dynmap/debug/Debug.java

@@ -0,0 +1,32 @@
+package org.dynmap.debug;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class Debug {
+    private static List<Debugger> debuggers = new LinkedList<Debugger>();
+
+    public synchronized static void addDebugger(Debugger d) {
+        debuggers.add(d);
+    }
+    
+    public synchronized static void removeDebugger(Debugger d) {
+        debuggers.remove(d);
+    }
+    
+    public synchronized static void clearDebuggers() {
+        debuggers.clear();
+    }
+    
+    public synchronized static void debug(String message) {
+        for(Debugger d : debuggers) d.debug(message);
+    }
+
+    public synchronized static void error(String message) {
+        for(Debugger d : debuggers) d.error(message);
+    }
+
+    public synchronized static void error(String message, Throwable thrown) {
+        for(Debugger d : debuggers) d.error(message, thrown);
+    }
+}