* Add Output support for a number of builders

* ../src/ngraph/builder/autobroadcast.cpp

* Remove some _values

* Simplify

* Simplify, add some more ops/builders

* ONNX failures

* Some GetOutputElement changes to help with Output<Node>

* Convert some ops to use Output<Node> inputs

* Review comments

* Some more changes of nodes to outputs

* Chane names for OutputVector helpers to avoid API change

* Cleanup