Merge branch 'develop' of github.com:sleuthkit/sleuthkit into develop

.travis.yml

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

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

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

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

...a/src/org/sleuthkit/datamodel/SleuthkitCaseAdminUtil.java

...c/org/sleuthkit/datamodel/blackboardutils/Attachment.java

...tamodel/blackboardutils/CommunicationArtifactsHelper.java

...g/sleuthkit/datamodel/blackboardutils/FileAttachment.java

...euthkit/datamodel/blackboardutils/MessageAttachments.java

...rg/sleuthkit/datamodel/blackboardutils/URLAttachment.java

tsk/auto/db_postgresql.cpp

tsk/auto/db_sqlite.cpp

tsk/auto/tsk_db.h