Creating RefsetSearchView, controller and fxml (although names may
change); adding RefsetContainsConcept AssertionNode for QueryBuilder;
moving QueryNodeTreeViewTreeCell to own class to allow use by other
views; creating QueryBuilderHelper to allow use of Query evaluation by
other views; changing CompoundLogicalNode minimum children to 1 from 2;
adding REFSET_CONTAINS_CONCEPT to QueryNodeType; refactoring
QueryBuilderViewController to make functionality available to other
views, fix various GUI bugs and add functionality such as add-parent;
adding support for REFSET_CONTAINS_CONCEPT to ClauseFactory and
refactoring to eliminate duplicate code; moving
ObjectWithTemporaryUniqueId and TemporaryUniqueIdCache to otf-util