Merge remote-tracking branch 'upstream/develop' into update04142020

Makefile.am

NEWS.txt

README.md

bindings/java/build.xml

bindings/java/doxygen/Doxyfile

bindings/java/doxygen/artifact_catalog.dox

bindings/java/doxygen/blackboard.dox

bindings/java/doxygen/images/json_attribute.png

bindings/java/ivy.xml

bindings/java/nbproject/project.xml

.../java/src/org/sleuthkit/datamodel/BlackboardArtifact.java

...java/src/org/sleuthkit/datamodel/BlackboardAttribute.java

bindings/java/src/org/sleuthkit/datamodel/Bundle.properties

...va/src/org/sleuthkit/datamodel/CommunicationsManager.java

...java/src/org/sleuthkit/datamodel/CommunicationsUtils.java

bindings/java/src/org/sleuthkit/datamodel/DerivedFile.java

bindings/java/src/org/sleuthkit/datamodel/SleuthkitCase.java

.../java/src/org/sleuthkit/datamodel/TimelineEventTypes.java

...euthkit/datamodel/blackboardutils/ArtifactHelperBase.java

...tamodel/blackboardutils/CommunicationArtifactsHelper.java