code: function init(){
  
      frameUnixTime = utils.getUnixTimeInMilliseconds();
      frameDuration = 0;
      frameDurationClone = 0;
      timeSinceStart = 0;
      playTimeSinceStart = 0;
      appActive = true;
      appPlaying = true;
      videoDuration = 0;
      videoPlaying = false;
  
  }
docs: Init the time manager, sets frameUnixTime to current value
  @memberof TimeManager