Data-type matching not clear

[adamjrice]

Issue Overview

The correspondence between Pods.io fields and Gravity Forms fields not well documented.

Discussion

Some field correspondences are obvious: a single line of text is the same in both Pods.io and Gravity Forms. However, there are some other data types, especially for booleans, where the correspondence is less obvious.

It would be helpful to have an explicit list showing "if you are using this data type in Pods.io, use this element in Gravity Forms."