MedicationReference Checking

[radamson]

• d003063 contains style and documentation updates
• 4274b42 makes existing MedicationStatement tests go over all MedicationStatements, not just the first
• The rest focuses on reading MedicationReferences provided and evaluating them against the relevant Argonaut Profile

Looking for feedback on:

• check_resource_against_profile vs the existing method test_resources_against_profile. The existing method retrieves references from the database and reads them, which might not be possible with contained resources [1]. I'm sure my implementation could be improved (and the commonality better considered).

• validate_reference_read_reply vs validate_read_reply for similar reasons (and the fact that the id property of the reference doesn't align with the id of the resource referenced

[1] "In some circumstances, the content referred to in the resource reference does not have an independent existence apart from the resource that contains it - it cannot be identified independently, and nor can it have its own independent transaction scope." - DSTU2 Contained References

[arscan]

I added a pass option that allows the user to return a message on a pass. Also a few cleanups. Are you ok with my changes @radamson