Need to be able to attach other information to data that is processed

[odscjames]

Currently, the only fields in the library are the ones needed for the splitting. We don't even store an Activity or Transaction ID.

This will make the library unusable; As a library user I need to be able to have a data set of activities and transactions and process them through the library and get a result with all the data I need attached - activity ID's and other fields, transaction ID's and other fields ....

Acceptance criteria

1. I can have a dataset of activities and transactions including data that is not needed for the splitting, put it through the library, and get split transactions out the other end with all the other data still there