Allow scripts to vary based on custom field values

[ajohn25]

Is your feature request related to a problem? Please describe.
Sometimes the differences in an intended script based on custom fields are wider than the value of the field itself. For example:

For dems, communicate we're down in the ballot counting, for repubs, say we want every vote to be counted

Describe the solution you'd like
Allow customizing part of a script based on a custom field value, for example (pseudocode):

• if party affiliation = dem : {cure_pitch} = "We're down 10 votes, so every cured ballot makes a difference!"
• if party affiliation = rep : {cure_pitch} = "We want every voter's ballot to be counted!"

Some possibilities for how users could specify the script changes are described below

Describe alternatives you've considered

1. A dialog or a larger UI built for this particular flow
2. Integration of a templating language like Jinja