added a tree() example to the docs to clear up any confusion about what happens when duplicate nodes are realized in a tree projection.
added a tree() example to the docs to clear up any confusion about what happens when duplicate nodes are realized in a tree projection.

robertdale/tinkerpop,jorgebay/tinkerpop,artem-aliev/tinkerpop,apache/incubator-tinkerpop,artem-aliev/tinkerpop,apache/tinkerpop,apache/incubator-tinkerpop,robertdale/tinkerpop,apache/tinkerpop,jorgebay/tinkerpop,robertdale/tinkerpop,krlohnes/tinkerpop,krlohnes/tinkerpop,artem-aliev/tinkerpop,pluradj/incubator-tinkerpop,apache/tinkerpop,jorgebay/tinkerpop,apache/tinkerpop,jorgebay/tinkerpop,krlohnes/tinkerpop,robertdale/tinkerpop,robertdale/tinkerpop,apache/tinkerpop,pluradj/incubator-tinkerpop,krlohnes/tinkerpop,krlohnes/tinkerpop,apache/tinkerpop,artem-aliev/tinkerpop,apache/tinkerpop,pluradj/incubator-tinkerpop,artem-aliev/tinkerpop,apache/incubator-tinkerpop