entityManager->createQuery() result improvements

[theUm]

It would be good if createQuery will support collect() cypher syntax and non-Node result parameters. Basically we need to merge new QueryResultMapping that supports inly nodes with old one, that supported basic types.

[ikwattro]

It should be supported, the only thing is that you would get for now a raw result instead. But yes some improvements will come for sure.

[ikwattro]

Fixed by #125

[ikwattro]

I shipped it in RC4, updated documentation :

http://neo4j-php-ogm.readthedocs.io/en/latest/getting_started/tutorial/#using-custom-cypher-queries

[theUm]

Thank you, very helpful.