Make Traversal::setPruneEvaluator() and Traversal::setReturnFilter() chainable.
Make Traversal::setPruneEvaluator() and Traversal::setReturnFilter() chainable.

Vinelab/neo4jphp,markus-perl/neo4jphp,sgpatil/orientdb-php,jadell/neo4jphp,stevenmaguire/neo4jphp