Title: Notify Marshals and Vice-Marshals when nobles are added to or taken out of their armies.
Summary: When nobles are added to an army, there's no way for the Marshal to know unless he notices the new addition on the Army Information page. Having a message notify him when it happens would make things more convenient. It is his army - he would know when a new noble joins it or one leaves.
Benefits: Convenience for the Marshal.
Possible Exploits: None.