Verification Tool - 8 more rules + performance enhancements

[OlliL]

• Add 8 additional rules:
  • test if the person has events in wrong order
  • test if the family has events in wrong order
  • test if the person has events with role Unknown
  • test if the family has events with role Unknown
  • test if the persons families are ordered incorrectly
  • test if children are ordered incorrectly within a family
  • test if a person's burial date is too late
  • test if a person's baptism date is too late considering family tradition
• Enhance performance by optimizing the caching-logic and change the order how people and families are process to maximize cache hits.

[Nick-Hall]

Fixed the remaining garbage collection issues.

The get_message method of four family rules was being set to father_message or mother_message. This was preventing garbage collection when the rules failed. I have set self.get_message = None to avoid this.

When fixing this, I noticed that the rules were being recreated for each person/family. This appears inefficient and may be worth investigating in the future.

There was a similar garbage collection issue with the UpdateCallback class used to update the progress bar. I set the update method to None after the rules are run to fix this.