Adds a Game Rule (ON by default) that turns off the decisions to train with your Regent or train your Heir.

This game rule turns the decision ON or OFF for everyone, including the AI.

• When you become an adult, if you former regent doesn't like you, is stronger than you, and is ambitious, deceitful, or is of a different faith & is zealous, you will receive an event where they declare war for your primary title. If you lose, you become their vassal. If you win, you take them prisoner and they are a criminal allowing you to revoke titles
  
• If you are the regent in the above scenario, then you will receive an event allowing you to get a pressed claim on your liege's primary title. You can turn down this offer
  
• Being the Regent now provides benefits to the Regent. For balance, I took the primary bonus from each councilor and divided it by a quarter. So, you get a lot of little modifiers while you're regent.

• Typos in the code that could have affected which character is auto-assigned as regent for rulers 8 and under
  
• You couldn't see the Regent position on your Liege's council. It was still showing the Spouse. That's fixed

On game start, I was erroneously checking for previous title holders which was causing errors.

The code wasn't needed, so it was removed.