## Validator Changes
* Update terminology for changes to tx validation policy: Wrong displays change from a warning to an error
* Add parameter ```-display-issues-are-warnings``` for restoring original behaviour that display issues are warnings
* Relax constraints on Reference targets for logical models
* Update dutch and german validation error messages + minor improvements to error messages
* Fix r5 url for package fetch (#1260) …
## Other code changes
* Fix up all terminology cache tests
* Switch to System.err for now + report missing constants
* Add I18n tests for coverage and plural validity + fix missing messages
* Partial fix for R4/R5 conversion issues
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## Validator Changes
* Fix NPE validating StructureMap
* Improve error message about uri values
* Fix for wrong display when server returns error
* Slight improvement in performance
* Fix FHIRPath split function (parameter is not regex)
* Stop warning that Markdown autolinks need to be escaped
* Allow NPM package versions to have the form {id}#{url} for direct access to packages
## Other code changes
* Support for NamingSystem conversion of url, version, and title (for THO)
* Update Conversion package docs (#1257) …
* Return codeableConcept from validate-code
* Refactor: Resource Root Elements Conversion
* Minor fixes for R5 redirector
* Fix bug handling filter, and refactor terminology code
* Fix for dstu2016may Resource equals methods (#1251) + Tests a
***NO_CI***
## Validator Changes
* Fix bug accessing canonical resources on servers
## Other code changes
* Various changes to support terminology service testing
***NO_CI***
## Validator Changes
* Structure map validation improvements
## Other code changes
* Fix wrong name for systemVersion Parameter
* Language improvements for Lang Packs
* Fix up StructureMap R4/R5 conversion
***NO_CI***
## Validator Changes
* Improved Error messages when code is not in value set + various typo fixes
* Updated Dutch translations for error messages
* More informative failures when questionnaire value set validation fails
* Warnings when extension context is 'Element'
* Fix missing source id for tx server messages in validation output
## Other code changes
* Move HTTP logging to a sub-directory of temp
* Default to text log not HTML log for terminology logging, and don't spuriously escape the text log
* Use JSON not XML by default when using R4 terminology service
* Add support for R6 final version
* Bump HAPI to 6.4.1
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