- miscellaneous small fixes

- add support for preventing all commands to be run on the channel by default. Now TechBot only answers some of the commands in PM
- add back the error Command

svn path=/trunk/; revision=34079

irc/TechBot/TechBot.Library/TechBotService.cs

@@ -81,7 +81,7 @@ namespace TechBot.Library
                     try
                     {
                         cmd.Initialize();
-                        cmd.ExecuteCommand();
+                        cmd.Run();
                         cmd.DeInitialize();
                     }
                     catch (Exception e)