Morale update

[Rias]

From the changelog: Morale bonuses of the same source type no longer stack. If a new morale bonus of the same source type is greater than one already being experienced, the greater will replace the lesser rather than add to it.

On the plus side, this means I can add a lot more morale-boosting events, knowing that people can't just rapidfire repeat the same thing to trivially max out morale. So if you have ideas for more events that could potentially improve a character's morale, let me know!