Template monster support

[Zuljita]

Things like Fungus and Ooze can change a fair bit in CER depending on random choices in creation. We need to develop a function that picks the needed subtypes and adds them to the monsters, then spits out a new CER for them. Once this works overall, it would be neat to be able to support something like adding a Warlord template to an Orc and adjust CER accordingly.

[Syndaryl]

This would be cool for handling ideas like the lenses in GURPS Dungeon Fantasy Monsters 1, but many of those lenses require a lot of GM judgement to merge into the monster and therefore do unpredictable things with the CER. I'm not sure how to resolve this yet.