Made Event and its implementations serializable

src/main/java/envoy/event/Event.java

@@ -1,5 +1,7 @@
 package envoy.event;
 
+import java.io.Serializable;
+
 /**
  * Project: <strong>envoy-common</strong><br>
  * File: <strong>Event.java</strong><br>
@@ -9,7 +11,7 @@ package envoy.event;
  * @param <T> the type of the Event
  * @since Envoy v0.2-alpha
  */
-public interface Event<T> {
+public interface Event<T> extends Serializable {
 
 	/**
 	 * @return the data associated with this event

src/main/java/envoy/event/IdGeneratorRequest.java

@@ -11,4 +11,6 @@ package envoy.event;
  * @author Kai S. K. Engelbart
  */
 public class IdGeneratorRequest implements Event<Void> {
+
+	private static final long serialVersionUID = 1431107413883364583L;
 }

src/main/java/envoy/event/MessageStatusChangeEvent.java

@@ -18,6 +18,8 @@ public class MessageStatusChangeEvent implements Event<Message.MessageStatus> {
 	private final Message.MessageStatus	status;
 	private final Date					date;
 
+	private static final long serialVersionUID = 4566145392192761313L;
+
 	/**
 	 * Initializes a {@link MessageStatusChangeEvent}.
 	 *