Release: v6.0.16

## Validator Changes

Post DevDays Release - many significant changes!

* Add ```-watch-mode``` parameter (See [doco](https://confluence.hl7.org/display/FHIR/Using+the+FHIR+Validator#UsingtheFHIRValidator-Watchmode))
* Start checking constraint expressions defined in profiles and logical models, and update FHIRPath for logical models
* Start checking ElementDefinition.mustHaveValue and ElementDefinition.valueAlternatives
* Start validating derived questionnaires
* Tighten up checking on FHIRPath - enforce use of ```'```, and don't accept ```"``` for string delimiters
* Add ```-allow-double-quotes-in-fhirpath``` parameter ([doco](https://confluence.hl7.org/display/FHIR/Using+the+FHIR+Validator#UsingtheFHIRValidator-LegacyFHIRPathSetting))
* Fix error when validating profiles that mix canonical() and Reference() types
* Fix extension context checking
* Fix erroneous FHIRPath expression eld-11 when loading
* Fix incomplete support for ```-display-issues-are-warnings``` parameter
* Fix broken NullFlavor binding in R4
* Fix various NPE errors doing value set validation (+ logging tx operations)
* Minor performance improvements to start up time
* Auto-update implied slicing elements when min < slice min

## Other code changes

* Add CodeQL to the build process
* Various NPE fixes
* Add getValueAsString(TemporalPrecisionEnum) method to date/time types
* Fix rendering for unresolvable ValueSets
* Remove r4b eclipse project files
* Upgrade multiple dependency libraries (per CodeQL)
* Only record sorting errors when generating snapshots when debug mode is on
* Tighten up SSL certificate checking
* Partial refactor of CLI parameter handling
* Fix path regex (per CodeQL)
* Remove erroneous logging from conversion tests
* Rendering improvements for various profile related extensions
* More work on TxTests operation (lenient wrt extensions)
* Fix handling of summary extension (delete duplicate tools summary extension, and don't inherit it)
* Reprocess URLs in Markdown extensions on both StructureDefinition and ElementDefinition
* Improve URL detection in markdown when reprocessing URLs
***NO_CI***

org.hl7.fhir.convertors/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

org.hl7.fhir.dstu2/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.0.16-SNAPSHOT</version>
+		<version>6.0.16</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

org.hl7.fhir.dstu2016may/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.0.16-SNAPSHOT</version>
+		<version>6.0.16</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

org.hl7.fhir.dstu3/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

org.hl7.fhir.r4/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.0.16-SNAPSHOT</version>
+		<version>6.0.16</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

org.hl7.fhir.r4b/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.0.16-SNAPSHOT</version>
+		<version>6.0.16</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

org.hl7.fhir.r5/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>ca.uhn.hapi.fhir</groupId>
 		<artifactId>org.hl7.fhir.core</artifactId>
-		<version>6.0.16-SNAPSHOT</version>
+		<version>6.0.16</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

org.hl7.fhir.report/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

org.hl7.fhir.utilities/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

org.hl7.fhir.validation.cli/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

org.hl7.fhir.validation/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>ca.uhn.hapi.fhir</groupId>
         <artifactId>org.hl7.fhir.core</artifactId>
-        <version>6.0.16-SNAPSHOT</version>
+        <version>6.0.16</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

pom.xml

@@ -14,7 +14,7 @@
     HAPI FHIR
     -->
     <artifactId>org.hl7.fhir.core</artifactId>
-    <version>6.0.16-SNAPSHOT</version>
+    <version>6.0.16</version>
     <packaging>pom</packaging>
 
     <properties>