it in the response data structure along with the actual user input. Tag data
can be used in subsequent expressions, in [[tag]] templated text replacement,
and to classify responses in an arbitrary way.
Refactored Survey expression utility subs that lookup values/scores/tags in
external assets.
Fixed bug whereby only highest precedence Survey expression was being evaluated
rather than letting them all run and do their own short-circuiting.
3dda2b49d4