Refactor time bound associations.
Refactor associations on Certificate.
Refactor associations on ExportRefundNomenclature.
Remove unused code from TimeMachine.
Refactor associations for Measure.
Refactor associations for GeographicalArea.
Refactor associations on GoodsNomenclature.
Refactor associations on MeasureComponent.
Refactor associations for MeasureCondition.
Refactor associations for MeasureConditionComponent.
Refactor associations on QuotaOrderNumber.
Add TariffValidator description messages.
Fix eager loading related issues.
Simplify time machine, remove redundant methods.

Strategy is not needed, you either are in TimeMachine block or not and
that impacts the result of the query.
Footnote association missing part of join key.
Improve eager loading for the declarable.
Comments on TimeMachine.
Add association order that was left out.
Merge pull request #55 from alphagov/refactor_time_bound_associations

Refactor time bound associations