Namespace data and refactor calculate function
Reinstate modifiables closure in calculator and fix broken reference
Add potential edicts dropdown

Next task is hooking it up to the modifiables object. Unfortunately, that data isn't
exactly formatted in the way most conducive to this, so I'll need to think about how
best to reformat it.
Rename 'modifiable' to 'editable' to avoid overloaded term

Modifiable implies "thing augmented by static values", like the die roll
in a check, while I was going for "thing edited by user."