Rewrote messaging structure for more abstractness.

This commit adds a new boolean-configurable feature called last-message-reply-recipient, defaults to true for new installs and false for old installs, which states whether to use the new messaging functionality or not.
This commit deprecates Console#getCommandSender(Server) and provides Console#getInstance()#getCommandSender() for future usability.

Essentials/src/com/earth2me/essentials/Console.java

@@ -1,32 +1,73 @@
 package com.earth2me.essentials;
 
+import com.earth2me.essentials.messaging.IMessageRecipient;
+import com.earth2me.essentials.messaging.SimpleMessageRecipient;
+
 import org.bukkit.Server;
 import org.bukkit.command.CommandSender;
 
 
-public final class Console implements IReplyTo {
-    private static final Console instance = new Console();
-    private CommandSource replyTo;
-    public final static String NAME = "Console";
+public final class Console implements IMessageRecipient {
+    public static final String NAME = "Console";
+    private static Console instance; // Set in essentials
+    
+    private final IEssentials ess;
+    private final IMessageRecipient messageRecipient;
 
-    private Console() {
+    public static Console getInstance() {
+        return instance;
     }
 
+    static void setInstance(IEssentials ess) { // Called in Essentials#onEnable()
+        instance = new Console(ess);
+    }
+    
+    /**
+     * @deprecated Use {@link Console#getCommandSender()}
+     */
+    @Deprecated
     public static CommandSender getCommandSender(Server server) throws Exception {
         return server.getConsoleSender();
     }
 
-    @Override
-    public void setReplyTo(CommandSource user) {
-        replyTo = user;
+    private Console(IEssentials ess) {
+        this.ess = ess;
+        this.messageRecipient = new SimpleMessageRecipient(ess, this);
     }
 
-    @Override
-    public CommandSource getReplyTo() {
-        return replyTo;
+    public CommandSender getCommandSender() {
+        return ess.getServer().getConsoleSender();
     }
 
-    public static Console getConsoleReplyTo() {
-        return instance;
+    @Override public String getName() {
+        return Console.NAME;
+    }
+
+    @Override public String getDisplayName() {
+        return Console.NAME;
+    }
+
+    @Override public void sendMessage(String message) {
+        getCommandSender().sendMessage(message);
+    }
+    
+    /* ================================
+     * >> DELEGATE METHODS
+     * ================================ */
+
+    @Override public MessageResponse sendMessage(IMessageRecipient recipient, String message) {
+        return this.messageRecipient.sendMessage(recipient, message);
+    }
+
+    @Override public MessageResponse onReceiveMessage(IMessageRecipient sender, String message) {
+        return this.messageRecipient.onReceiveMessage(sender, message);
+    }
+
+    @Override public IMessageRecipient getReplyRecipient() {
+        return this.messageRecipient.getReplyRecipient();
+    }
+
+    @Override public void setReplyRecipient(IMessageRecipient recipient) {
+        this.messageRecipient.setReplyRecipient(recipient);
     }
 }