Smarter icarus.msg, new truthgazer.msg, fix long-standing message bug

Sorry for putting this all in one commit; it all happened at the same time
as a direct conscequence of trying to get icarus.msg to be smarter.
There's a compilation error on MessageHelpers.ts:24, but the game
seems to run fine so I'm committing and coming back to it later.

src/engine.tsx

@@ -25,7 +25,7 @@ import {
 } from "./PersonObjects/formulas/reputation";
 import { hasHacknetServers, processHacknetEarnings } from "./Hacknet/HacknetHelpers";
 import { iTutorialStart } from "./InteractiveTutorial";
-import { checkForMessagesToSend, initMessages } from "./Message/MessageHelpers";
+import { checkForMessagesToSend } from "./Message/MessageHelpers";
 import { loadAllRunningScripts, updateOnlineScriptTimes } from "./NetscriptWorker";
 import { Player } from "./Player";
 import { saveObject, loadGame } from "./SaveObject";
@@ -439,7 +439,6 @@ const Engine: {
       initCompanies();
       initFactions();
       initAugmentations();
-      initMessages();
       updateSourceFileFlags(Player);
 
       // Start interactive tutorial