Add sequence and lab_result_id properties; alias id to LabPanelId
Add days_apart property, alias date_of_service to TranscriptDos, id to LabResultId
Add lab results to Visit
Add Hashie::WhiteTrash, which uses properties as
a whitelist and ignores, rather than raise errors,
undefined attributes
Modify sesheta models to inherit from Hashie::WhiteTrash
Add Visit#lab_results spec
Bump version to 0.0.5