Added TAB autocomplete

Now handles TAB keypresses and ask the server for an autocompletion,
just like a vanilla client does.

MinecraftClient/Program.cs

@@ -123,6 +123,7 @@ namespace MinecraftClient
                         //Will handle the connection for this client
                         Console.WriteLine("Version is supported.");
                         MinecraftCom handler = new MinecraftCom();
+                        ConsoleIO.SetAutoCompleteEngine(handler);
                         handler.setVersion(protocolversion);
 
                         //Load & initialize bots if needed