* Partially removed cmake duplication with IE cmake
* Deprecated API usage: fixed or suppressed
* Fix for TypeRelaxed
* Canonical form for ngraph includes
* Removed extra visibilit settings; removed graphviz find_package
* Removed var_functions module; canonical includes for ngraph::reference
* Fixed deprecated API in ngraph tests
* Re-use standard cmake macro for shared libs
* Trying to fix ONNX importer tests