MonsterGroupRegenSystem with weekly Schedule like as CryWolf

Add Schedule system to MonsterGroupRegenSystem like as CryWolf

In the current schedule system, we only can set a time of the day.

<Group Index="1">
  <Spawn StartHour="21" StartMinute="00" AppearanceRate="100" />
</Group>

But would is very useful set schedule like as CryWolf

<Schedule>
  <Start Mode="0" State="1" Month="-1" Day="-1" DayOfWeek="6" Hour="22" Minute="00" />
</Schedule>

What do you think IGCN Team?