Added multichat operation set definition and Gibberish protocol implementation. Related issues: Issue #241 , Issue #244, Issue #250

Added an event that would be dispatched upon changes in the state of a chat room.

src/net/java/sip/communicator/service/protocol/event/ChatRoomPropertyChangeEvent.java

@@ -0,0 +1,27 @@
+/*
+ * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.sip.communicator.service.protocol.event;
+
+import java.util.*;
+
+/**
+ * <tt>ChatRoomChangeEvent</tt>s are fired to indicate that a property of
+ * the corresponding chat room (e.g. its subject or type) have been modified.
+ * The event contains references to the source chat room and provider, the name
+ * of the property that has just changed as well as its old and new values.
+ *
+ * @author Emil Ivov
+ */
+public class ChatRoomPropertyChangeEvent
+    extends EventObject
+{
+    public ChatRoomPropertyChangeEvent(Object source)
+    {
+        super(source);
+    }
+
+}