Replace all occurances of $graph->getNumberOfVertices()
replaced with count($graph->getVertices())
Remove now unused Set::getNumberOfVertices()
Remove now unused Algorithm\Search\Base::getNumberOfVertices()
Replace all occurances of $graph->getNumberOfEdges()
replaced with count($graph->getEdges())
Remove now unused Set::getNumberOfEdges()
Set\DualAggregate interface replaces legacy Set class
Update references to new Set\DualAggregate
Rename Algorithm\BaseSet to Algorithm\BaseDual
Add replacement for `Set` to CHANGELOG
Update CHANGELOG
Merge pull request #75 from clue/remove-set

Remove base `Set`