* Enable NNP reverse build, clean up ngraph repo

* clean mkldnn cmake

* More extensive examples of graph building.

* Review comments

* Review comments

* Review comments

* topolotical-sort based node clustering

* cmake builds

* Argon manager renamed to NNP along with placement

* nnp dir cmake changes

* tests pass

* more renames

* somemore renames

* reslove redefination

* revert to ARGON_API

* more PR comments and remove nnp-fusion tests as redundant

* update path

* fix format

* add python dir to check-code-format and re-run apply-code-format on it

* 0644 -> 0755

* initial support for hybrid transformer

* add broadcast_vector_rowwise_reversed for hybrid test

* headerc

* get function placement fix

* conv ref test generator graph node in labmda fuction

* rename map_parameter_to_source_node

* type change map_parameter_to_source_node

* use interpreter for numerical derivative

* better comments

Emacs likes to add hidden symlinks with names like '.#myfile.cpp' that don't actually point to real files as a locking mechanism, which cause the format check/apply scripts to fail. This tweaks the format scripts to ignore files that are symlinks (adds a -type f predicate to the find commands), which gets around this issue.