* Change serializer disable so that it is enabled by default if you do nothing

* fix serializer disable

* fix disabled build

* layout-aware cpu tensor copy_from

* - add unit test case for tensor "copy_from"
- set default layout after copy_from src to destination

* - added test case to copy between two different layouts

* - fix clang error
 - added test case to check copy_from if the two tensor layouts are different
- fix the LayoutDesc comparision

* fix windows build error

* - move "cop_from" unit tests from tensor to cpu_test

* fix compilation error

* Added more unit tests

* fix read and write API in cpu_tensor_view

* Failing conv test case

* Opt for mkldnn::algorithm::convolution_direct if input channel is less than 8

* Comment

* Unified interpolate layer op

* Minor attr name changes

* Use Eigen kernel for Gather when axis is 0.

* Fix style error.

* Rename variables.

Fix bugs.

Use helper function.

* Add one unit test.

* Check if openmp is defined.

* Change unit tests.

* Use Eigen kernel for uint8_t type.

Add one uint8_t unit test.

Address PR feedback.

* Update cpu emitter.

* Use updated reduced-size clDNN

* Remove the obsolete BOOST_VERSION variable

* remove tensor offset from tensor read/write calls because it was never used

* fix build errors

* fix build errors

* fix python test errors

* more python fixes

* revert change

* Make old version of read/write deprecated

* fix python read overload

* one more try to fix python binding

* fix python

* yet another try

* why is this so hard

* fix?

* add text to changes.md

* add BatchMatMul unit test to all builds

* Check that interpreter is available

* fix error

* enable tests for features not yet implemented

* wip

* build works with serialize disabled

* one more try

* disable unit test when json disabled

* handle case where serialize is disabled in python test

* one more fix

* Fix klocwork issues

* Need dynamic cast

* Update to use new backend constructor pattern

* Update PlaidML unit test exclusions

*  Use Eigen kernel for ScatterAdd.

* Emit ScatterAdd Eigen kernel for CODEGEN.

Add comments.

Address PR feedback.

* Add more unit tests.

Fix style error.

Add ScatterAdd to AssignOpMap.

* Combine non-scalar cases together.

* Address PR feedback.

* Fix a bug.

* Use reshape to make the shapes of two slices match.

* Rename variables.

Fix bugs.

Use helper function.

Add one unit test.

* Add reshape back.

* Added getters for dynslice

* Style check fixes

* Combine transpose and reshape pattern into a single reshape

* optimize reshapes only if in/out shapes dont match

* Default to svg format for visualizing graphs and provide an env variable to change it

* Handle 0 and -1 in shape inputs for dynamic reshape op

* Flag to control semantics of zero values in dynreshape op

* Support for no-arg op construction

* Add a-ops.

* Two const init variations to try to solve windows link error

* Try export for windows

* Create outputs as needed, test

* Remove attribute helpers

* another windows try

* windows

* windows

* Partial node cleanup

* Review comments
Node destruction that doesn't blow out the stack on deep graphs

* Review comments

* Update src/ngraph/node.hpp
Co-Authored-By: Adam Procter <adam.m.procter@intel.com>

* Have huge test check that nodes were deleted

* Switch constructors to use Output instead of Node

* Review comments

* Add some comments

Avoid negative values in int64 initialization for cases where int64 parameters are used as indices (#3004)

* handle case where a node's output is connected multiple inputs of another node

* fix creation of the FunctionCall to have the correct outputs

* fix per review comment

* Cleanup how compile flags set and used by nGraph and external projects.
Set C++11 through CMake and pass it down to external projects.
Prefer CMake variables such as CMAKE_POSITION_INDEPENDENT_CODE and
CMAKE_CXX_STANDARD instead of explicitly setting compiler dependent
flags.
Create json compilation database for external projects.
CMAKE_CXX_FLAGS is used as common global options for nGraph and external
projects.
add_compile_options() is used for local options for current and sub
directories.
add_definitions() is used for setting definitions for current and sub
directories.
Note: Global options are not passed down to some external projects.
Note: mkl-dnn resets CMAKE_CXX_FLAGS internally.
Note: TBB and MLSL are not CMake based.
Noet: Eigen and json is header only library.

* Fix error.

* Fix error. (second attempt)

* Cleanup code.

* Allow check for undefined macro.

* Try to fix cldnn issue.

* Set type for CMake arguments.

* Pass C++ standard to protobuf.

* Pass C++ standard down to TBB.

* Change how Clang specific flags are handled.

* Fix error.

* Workaround for compile error on Baidu's PDPD docker.

* Fix windows build error.