Add mutation wet moral effects [Ready for Merging!]

* Causes the wet morale penalty/bonus to be affected by mutations. Fixes issue #1977.
* Moves said morale effects into mutations.json.
* Updates a few drench() call flags.
* Makes morale addition only rewrite duration/decay time if additive (causes positive buffs to not extend negative ones' durations/decay times)
* Moved a few library functions to be properly accessible
* Made morale from eating properly display item name again.