Contains multiple fixes to GetOutputElement, BatchNorm, autodiff, fprop_cache to integrate multi-output batchnorm and fprop_cache 

* Remove unsupported linker flags for Mac build.

* Restructure python binding.
Put low level direct wrapper for ngraph c++ API into ngraph/impl
Move high level API from ngraph_api to ngraph

* Move CMakeLists.txt to its own PR

Doc validation, cleanup, remove stuff we are not using, etc

* Cleanup docs

* Fix typo on syntax

* Update about page with Tunde's v2 of ngraph-ecostystem graphic

* Incorporating feedback from PR reviews

* Add more prereqs to table

* Cleanup neon install documentation

* fix doc build warnings

* Make sure Tundes v3 graphic links properly

* Add detail about ONNX imports to README as requested

* Fix the broken merge

[v0.1.0] add pointers for support and contributions

* Add required compiler and linker flags to meet sequrity requirements.

* Update compiler and linker flags for building python wrapper.

* fix fprop cache test error by cloning functions to preserve metadata

* CPU: Update Eigen

* CPU: Move patched Eigen master branch to NervanaSystems

* Fix Sphinx license to be directly copied from its repo

* Add license for pybind11, which is used by the python-bridge that was just added

* Add flags for SDL-3 compliance

* change check to support older versions of CMake

* added license files

* added project component to BSD-license.txt file

* added project components to remaining license files

* added additional files for the swagger-ui license

* removed extra python/LICENSE file

* CPU: Eigen-based Pad kernel

* CPU: Create a global Eigen thread pool and use it for padding

* Formatting fixes

* Wrapped convolution, max_pool, replace_slice, slice

* Friendly API for Ngraph++ Python bindings

* code review

* Update incorrect ngraph version used in README.md and add ngraph version
in file ngraph_ref

* Update ngraph-neon

* Friendly API for Ngraph++ Python bindings

* Flake8 style fix

* Friendly API for Ngraph++ Python bindings

* code review

* Update setup.py.in to include ngraph_api.

* Update ngraph-neon.

* Create separate build scripts for python2 and python3.

* Update ngraph-neon.

*  Tox configuration

 * automatically create virtualenvs for Python 2 and Python 3
 * run unit tests using pytest
 * check that code style is compliant with PEP8 using Flake8
 * run static type checking using MyPy

 See README.md for usage information.

* Unary Ops

Includes:

* abs
* ceil
* exp
* floor
* log
* neg
* sqrt

* Added MaxPool test

* Added Convolution op test

* mv mnist to examples/

* Enabled reverse op test

* Review fixes

* Review fixes pt.2

* Update ngraph-neon.

* Update setup.py.in

* Update ngraph-neon.

* Enable broadcasting

* Enable div op

* Enable mul op

* Enable sub op

* Enable add op

* Fix style and types for tox

* Review fixes

* Add docstrings

* Up to date with private-ngraph-cpp

* Update ngraph_ref

* Update ngraph-neon.

* Helper function for Constant Node

* Minimum and Maximum Ops

* Add dtype param to ng.constant

* add LICENSE and switch to Intel Copyright

* Added conv brop ops

* Fix pep8 warning in copyright

* Added convolution test

* Fixed copyright header

* Additional style checks

Includes:
* Do not use mutable data structures for argument defaults.

* Helper ng.equal

* Update ngraph-neon.

* Added convolution brop test

* Fixed format

* Add max pooling backprop.

* Add missing change.

* Fix style and add a Node method.

* Update ngraph-neon.

* Implicit casting of scalar values to Nodes in API helper functions

* Implicit casting unit tests

* Support for ngraph boolean type

* Add AvgPool support. Test cases will be added later.

* Update ngraph-neon.

* Extend Node class to support binary operators

* updating cpp master

* Update ngraph_ref

* Update ngraph-neon.

* Extend Node class to support more binary operators

* Bugfix for Constant op test

* Fix for reversed operators

* Enable tanh op

* Flake8-Bugbear requires Python3

* Fix for node with empty shape

* Wrapping serialize function

* Update setup.py.in

* Update __init__.py

* Fix import for static type checking.

* Enable logical ops

* Update ngraph-neon

* Enable dot op.

* Raise an error when user provided data that we currently don't support.

* Change raised error type to more appropriate.

* Fix: remove superfluous user input checking.

Actually Dot function inside ngraph++ performs input validation. The error
checking we want to do should be within ngraph_onnx interface.

* Enable conv2d op

* Added convolution test

* Remove currently unused arguments.

Dot can determine reduction axes inside ngraph++ for <= 2D cases.

* Fix function signature type annotation.

* Updated convolution test

* Added argon backend

* Update wrappers to match ngraph 8ad86ab9

* Update ngraph-neon.

* Update ngraph to d2d0196b

* Update python binding.

* Limit number of threads for parallel build.

* Update python wrapper.

* Update AvgPool constructor.

* Update python wrapper.

* Add Reshape op.

* Better conv default parameters

* Enable sum op

* Add reshape operation documentation.

* Review fix

* Added gpu skip

* API - Enable Pooling Ops (#55)

* Enable AVG Pooling OP

* Enable MAX Pooling OP

* Review fix

* Update python wrappers.

* Fixing the default argument handling for serializer function

* Update python wrapper.

* API - Change default Runtime to CPU (#58)

* Fix RuntimeError: function fails to compile

* Change default Runtime to CPU

* Fix for tox tests on CPU backend

* API - Add serialize method to Computation class

* Sync ngraph-cpp part 1

* Sync ngraph-cpp remaining

* Sync continued

* Sync to ngraph-cpp part 3

* Sync -- Changing test file

* update ref spec

* update cpp ref

* Update setup.py.in and rename concatenate.cpp and concatenate.hpp to concat.cpp and concat.hpp

* Add missing source file in setup.py.in

* Wrap manager class for calling the reshape elimination pass

* header file change

* Rename pass to passes to avoid python keyword conflict

* file rename

* Add src file in setup.py

* private-ngraph-cpp renamed to ngraph-cpp

* API - Integrate Shape objects (#66)

* Speedup for broadcasting in python_api

* Wrap relu & relubackprop op

* Type in setup.py

* Wrap Max op

* Wrap Product op

* Wrap Allreduce op

* Wrap FunctionCall op

* include function header file

* Wrap GetOutputElement op

* Wrap Min op

* Update ngraph cpp master

* Wrap BatchNorm op

* Wrap Softmax op

* Fix in setup.py, batchnorm.cpp & softmax.cpp

* Add __repr__ function to Shape objects.

* updating commit hash in README

* Downgrade python to python3.5

* Correct implementation of __str__ and __repr__ wrappers for Shape object and their usage from Node and Parameter

* Update wrapper

* Update setup.py.in to match setup.py

* Update ngraph-cpp to 89da71d3

* Update wrapper.

* Add sum, max, min and prod interfaces to ng++ Sum, Max, Min, Product respectively

* Add unit test for max, min, sum, and prod operations.

* Update README: ngraph-cpp repo has been renamed to ngraph

* Change pybind11 as a source only CMake external project

* Update python wrapper.

* Move pybind11 download location and remove legacy setup.py

* Update wrapper.

* Change package name from pyngraph to ngraph

* Remove python submodule.

* Move .gitignore

* Fix compilation issue after serializer api update.

* Remove files accidentally added by last RP to wrapper repo.

* Add missing packages to setup.py.in

* Fix module path issue.

* fix goe (jayaram)

* Fix wrapper and ngraph_api tests

* Add minimal documentation for the python wrappers.

* Add test_reduction.py in ngraph_api

* Update python nGraph doc.

* Remove commented out code.

* update README.md, delete ngraph_ref, fix tox

* Revert "Add minimal documentation for the python wrappers."

This reverts commit 2e61c698bd15f3b08dc096d4b1774d0cb52041ee.

* Revert incorrect way of adding doc.

* Revert incorrect way of adding doc.
This reverts commit 2e61c698bd15f3b08dc096d4b1774d0cb52041ee.

* Move conftest.py and fix in README

* Add minimal docstring for python wrappers.

* Format Wrapper cpp code

* add some docs for onnx

* Update install documentation

- Clarify the make -j use case from bob's PR
- Fix the words to be less wordy in some places - unit test does
  not need its own section
- Add placeholder for onnx integration discussion w Michal
- See if doxyfile adjustment can build docs faster

* Update install documentation

- Clarify the make -j use case from Bob's PR with Adam's suggestion
- Fix the words to be less wordy in some places - unit test does
  not need its own section
- Add placeholder for onnx integration discussion w Michal
- Fix Framework Integration Guide top links to be bullets
- See if doxyfile adjustment can build docs faster
- Fix grammar to the rendered title of embedded link

* Update framework-integration-guides.rst

* Update install.rst

* Update install.rst

* WIP review docs for onnx tutorial

- Fixed install instructions to clariy use of make -j as per discussion
- Added tutorial on how to run inference for CIFAR10 ResNet
- Condensed some instructions to involve less clicks when reading on web

* Friendly API for Ngraph++ Python bindings

* Preview doc build for review

* Preview doc build for review small edit

* More collab editing changes

* Make sure intro gets updated in both places

* Really add the changes this time

* PR review comments added

* Match changes made on 79c77fdd to resolve merge conflict

updated the contrib/docker/README.md to align with the latest updates

updated formatting for contrib/docker/README.md

renamed INSTALL to INSTALL.md

updated formatting for INSTALL.md