* update licenses for 2019

* style

* Move ParameterVector and ResultVector to the ngraph namespace where they belong

* update python wrapper

* more python fixes

* style

* Update setup.py

* fix some new code

* use line comments instead of multiline comments for license header

* update more

* update new files

* more header updates

* style

* add StopGradient op

* add StopGradient op src

* remove adjoints and add interpreter

* fix compile issue

* use nop_elimination and add unit-test

* update cmake

* update unit-tests

* move nop elimination pass to nGraph and add broadcast elimination

* fix pad test bug

* remove graph visualizer and clean up includes in nop eliminate test

* code format