Adder userId to Contacts

src/main/java/envoy/data/Contacts.java

@@ -13,10 +13,26 @@ import java.util.List;
  */
 public class Contacts implements Serializable {
 
+	private long		userId;
 	private List<User>	contacts;
 
 	private static final long serialVersionUID = 136970804968152871L;
 
+	@Override
+	public String toString() { return String.format("Contacts[%s]", contacts); }
+
+	/**
+	 * @return the ID of the user this contacts belong to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public long getUserId() { return userId; }
+
+	/**
+	 * @param userId the ID of the user this contacts belong to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public void setUserId(long userId) { this.userId = userId; }
+
 	/**
 	 * @return a list of users messages can be sent to
 	 * @since Envoy Common v0.2-alpha