* Add QuantizedConcat

* Remove unused variables and add check for size of mins and maxes vector

* Resolve conflicts

* Merged with master and addressed some PR feedback

* Avoid float comparison

* make min/max vector, add dequant/quanti

* fix dequant/quant scales

* fix CI build issue

* use calls for new backend API in unit tests

* fix compile error

* fix compile error

* IntelGPU backend: Comvolution support for double and code minor clean up

* PR2479. custom kernel selection fix

* [ONNX] Overriding custom ops

* Add UT

* Style Check

* Review & style fix

Changing clDNN to latest commit.

* IntelGPU backend: Quantize operations

* Update intelgpu_op_custom_kernels.cpp

* User friendly assert message

* User friendly assert message

* Update UT

* Utility function for reading binary file content.

* Style apply.

* Review. Add sanity check on file size.

* Style-apply.:

* Auto detect OSX_SYSROOT for macos >= 10.14

* Fix potential regex issue.

* Use git shallow clone if CMake >= 3.6. Remove BUILD_BYPRODUCTS.

* Fix ONNX, protobuf integration.

* [ONNX] Enable OneHot operation

* Add UT

* Style check

* Change converts

* Change assert messages

* Update comments

* Update onehot.cpp

* rename tensor view to tensor

* one more

* revert change

* handle channelwise scale mask

* add Quantize op to cpu_layout

* enable Quantize to use input layout for output

* add comments for channelwise mask

* add Dequantize to cpu_layout

* resolve style-check

* fix unsupported layout issue

* fix s8s8 reorder issue

* Use uniform naming for external project prefixes and use INSTALL_DIR instead of SOURCE_DIR for referencing prebuilt external libraries.

* TBB: Use single variable to share path across files.

* pass HostTensor all the way down

* fix distributed build error

* Cleaner API doc reference for compile call

* Add a useful table for nGraph namespaces

* Remove layout namespace

* Show exploding kernel problem on illustration like IEEE preso

* Inplace convert for bitcasting ops

* Dont passthrough blocked layouts

* More checks for types not handled by mkldnn

* IntelGPU backend: Separate backend and executable classes (#2447)

* Add notice to main ToC page about distributed training

* adding quantized convolution builders for ONNX

* fix build error

* fix CMakeLists.txt spacing