* Add getValueSetTimestamps(VariableEntity) to ValueTable
* Add IncrementalDatasource
Fix warnings
Use DestinationDatasource instead of DestinationTable
Delete Eclipse .settings folders
Work on OPAL-217: Support incremental import
Work on OPAL-217: Support incremental import
Work on OPAL-217: Support incremental import
Set incremental to false by default
Merge branch 'feature-incremental-import'