Add ChatBot logging to file and 'log' command

- log <text> will print '[BOT] text' to the console
- logged [BOT] lines can be written to a logfile
- chatbotlogfile INI setting is used to set the log file

MinecraftClient/Commands/Log.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace MinecraftClient.Commands
+{
+    public class Log : Command
+    {
+        public override string CMDName { get { return "log"; } }
+        public override string CMDDesc { get { return "log <text>: log some text to the console."; } }
+
+        public override string Run(McTcpClient handler, string command)
+        {
+            if (hasArg(command))
+            {
+                ChatBot.LogToConsole(getArg(command));
+                return "";
+            }
+            else return CMDDesc;
+        }
+    }
+}