Excel -> Pickles: Bring back FIT!

For some calculation-heavy domains (such as finance), Excel is the tool of choice for domain experts. Ward Cunningham knew this when he designed [FIT](http://fit.c2.com/).

I want to resurrect a FIT-like experience in Cucumber:

* Domain experts write tables
* Programmers write glue code

The question is - how will this glue code look? I'm not sure the familiar step definition abstraction fits here (no pun intended). The [fixture](http://fit.c2.com/wiki.cgi?FieldGuideToFixtures) model might be just what we want.

An Excel sheet plus fixtures would be translated to pickles, and from there on Cucumber would just run the pickles. I'm not sure how well the formatter abstractions would fit :-)

What's the simplest thing we could do as an experiment?

Start by reviewing the linked FIT fixture model and Cucumber's pickle and formatter abstractions. Define the smallest experiment that accepts an Excel table plus fixtures, translates it to pickles, and runs those pickles; done means the experiment demonstrates this flow and clarifies how the glue code should look.

Written by the indexing model from the issue text.