Use the list of incoming fields rather than the list of populated fields when finding changes.  Fixes #183.
Use the list of incoming fields rather than the list of populated fields when finding changes.  Fixes #183.

coddingtonbear/inthe.am,coddingtonbear/inthe.am,coddingtonbear/inthe.am,coddingtonbear/inthe.am,coddingtonbear/inthe.am