x 2019-12-20 2019-12-20 Write rails migration generators.
x 2019-12-20 2019-12-20 Write code to check what element files already exist.
x 2019-12-20 Write code to build all segments.
x 2020-01-02 2019-12-20 Figure out how to deal with loops.
x 2020-01-03 2019-12-20 Finish TransactionSetBuilder.

2019-12-28 If a loop can only repeat once, dont treat it as a loop.
2019-12-20 Add a DB persistence_method.
2019-12-20 Reset `Eddy.data` when `Eddy.config.persistence_method` changes.
2019-12-20 Check for conflicts in Rails generators.
2019-12-20 Write a Rails model generator.
2019-12-27 Generate "ref map" files.
2019-12-30 Logging
2019-12-30 JSON schema validation errors.
2020-01-02 Ensure loops dont go over repeat limit.
2020-01-02 Implement `Segment.max_use` & `Segment.min_use`.