Merge pull request #559 from neo4jrb/qp_delete_all

split query proxy methods into their own spec, add delete_all for qp
Revert "split query proxy methods into their own spec, add delete_all for qp"
Merge pull request #563 from neo4jrb/revert-559-qp_delete_all

Revert "split query proxy methods into their own spec, add delete_all fo...
Added documentation
merge yard
fix specs broken by core changes
move some specs out of active_model_spec
Merge pull request #567 from neo4jrb/reorg

move some specs out of active_model_spec
merge master
target_rel