Merge pull request #1650 from rcordovano/timeline-public-api-improvements

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

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

...rg/sleuthkit/datamodel/TimelineEventArtifactTypeImpl.java

...src/org/sleuthkit/datamodel/TimelineEventDescription.java

...s/java/src/org/sleuthkit/datamodel/TimelineEventType.java

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

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

...ings/java/src/org/sleuthkit/datamodel/TimelineFilter.java

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

...ngs/java/src/org/sleuthkit/datamodel/TimelineManager.java

...org/sleuthkit/datamodel/timeline/EventTypeFilterTest.java

tsk/auto/db_postgresql.cpp

tsk/auto/db_sqlite.cpp