Add canttalk module, few changes here and there to accomodate for it

modules/ttsSettings/index.js

@@ -13,6 +13,8 @@ module.exports = function (bot, api) {
 				api.announcementVoice = api.announcementEngine.getDefaultVoice();
 				api.respond(message, "Your voice name was invalid, so I switched to the default voice (" + api.announcementVoice + ") for " + api.announcementEngine.longName + " instead.");
 			}
+		} else {
+			api.respond(message, args[1] + " is not a valid engine name");
 		}
 	});
 }