fhir 0.0.6

FHIR library of versions R4, STU3, DSTU2, and R5 (draft) for Dart & Flutter.

[0.0.6]

• Simplified date, dateTime, instant (now implementers will have to deal with display instead of me)
• rewrote testing function (it's a pain to do deep comparisons of maps)
• doesn't follow classic check-test patterns, writes errors to file (makes it easier for me to debug)
• fixed some enums in dstu2
• expanded definition of url because dart's definition doesn't match with FHIR's
• relaxed base64binary (just a String now) requirements because Dart's is more narrow than FHIR's
• taking out resource.g.dart (not used, doesn't seem to change functionality)

[0.0.5]

• Refactored Dstu2 to be more consistent with other versions, field names are the same, some class names changed

[0.0.4]

• Changed primitive equality, returns true for Code('code') == Code('code') AND Code('code') == 'code

[0.0.3]

• Updated pubspec (again), added examples and documentation

[0.0.2]

• Immediately had to update it because of mispellings in pubspec.yaml

[0.0.1]

• 2020-08-28.