Union Fixes
- When creating a union with a special alliance like the HRE, the civilization will now be added to the alliance if it wasn't already a member.
- If a union is created with the Emperor or the alliance leader, the player will become the new Emperor.
- Manpower, regiment limit, and income bonuses are now correctly awarded after becoming Emperor.
- Unions are disabled when playing in Age of Chaos mode.
- Minor bug fixes