Merge pull request fhir-crucible#108 from fhir-crucible/headers_update

Update Headers

Update to v3.0.7

Update dependencies,travis. v3.0.5.

Release gem with ssl fix.

Merge pull request fhir-crucible#56 from fhir-crucible/update_1_8

Update client to FHIR v1.8

Version 1.6.9

Hotfix for CapabilityStatement support.