* 1. Added mkldnn support for Softmax
2. layout assignment for mkldnn softmax

* added assert to check softmax axis for mkldnn

* onnx: add importer cmakes
* onnx: use file(DOWNLOAD ...) command to download onnx.proto
* onnx: add Protobuf minimal required version

* cmake runs for interpreter

* more updates towards building on windows

* inplace compute

* fix warnings

* Initial support for convolution sum fusion

* Added in-place support for conv sum fusion and test cases

* reverting spurious changes

* Bug fix to account for inplace input in conv sum fusion

* fix compilation error

* Addressed PR feedback

* First IntelGPU backend based on clDNN with empty functions

* Backend/API:Conflicts resolved and comments addressed

* editing how to execute computation file for clarity and linenos

* Add placeholder for runtime docs

* Update section on backends, interpreter, and FPGA options

* add updated master to fix python_ci

* Weird autosummary issue reverted

* Clarify new section

* fix up docs

* Update pattern matcher doc based on Nik's presentation slides WIP

* Update doc structure and examples

* remove old folder

* Fix broken Tensorview refs

* . helping people document code more efficiently

* PR review edits

* Finish PR review comment fixes so far

* split patternmatcher PR

* small fixes to PM docs

* remove mark tags from source code

* Final PR cleanup edits

Moved maxpool padding to GPUAllocator, changed pad_required bool to include asymmetric padding check, and remove an error in gpu_emitter where allocation was happening twice for temporary memory (merge failure). (#1152)

* updated to work with llvm 8.1 that tensorflow is built with

* sane extensions on the mac

* not doing rpath on apple

* apply style

* inplace compute

* fix warnings

* address bob's feedback

* bob's feedback 2

* bobs feedback 3

* address bob's feedback 4

* remove reference to ngraph core code from codegen. add stand-alone implementations of needed funcions

* fixed potential pointer leak

* clean up file_util

* more file util cleanup, removing unused functions

* interpreter works on mac

* CPU and INTERPRETER build and pass unmit tests on macos

* move get_directory to file_util

* cleanup

* switch to using has_class for op::Skip

* apply format

* adding constant propagation pass

* adding test/constant_propagation.cpp

* template make_constant_reshape function

* code review feedback

* add missing files

* serialize logic for reverse_sequence

* Added serializer support for Softmax

* Fix bug with concat for 0-size tensors

* Simplify test for zero-length axes, per PR comments

* [doc] Fix code snippet in derive-for-training

* Fix another code snippet in derive-for-training

* add assert to make sure we don't replace unreachable nodes

* fix unittest failures

* sparsity fix

* fix mkldnn rpath

* fix compile warning

* close backends when exiting

* set backend output directory of backends to the ngraph output directory

* Aprocter/patch patch (#1119)

* Move more rpath stuff inside if(NOT APPLE)

* fix repatch problem with mkldnn library

* add updated patch command for older versions of cmake

* loop kernel + tests

* remove commented out code

* remove commented code; add comments

* copy_with_new_args +test

* add comment

* fix comp errors

* Move to depth-first serialization of graph for better cache behavior

* Added comment

* Force 64 byte stack alignment to avoid crashes from unaligned AVX loads/stores

* Revert "Force 64 byte stack alignment to avoid crashes from unaligned AVX loads/stores"

This reverts commit 84346420fbd0fbd5d05a4a1e8f5fae12bdc7348b.

* revert to breadth-first serialization

DEX Part 2

* enable more gpu ops test

* add reverse_sequence

* fix bugs, compiled

* fix index bug

* fix bug and clang format

* correct function name

* clang format

* remove extra ;

* remove tests from skip list

* add backward support, skip tests

* add back template<> line

* remove unecessary lines in kernel

* optimized strided convolutions

* clean up debug messages

* format fixes

* more tests

* even more tests

* adapt to resnet-50.v1

* fix format errors; remove changes from diff PRs

* enable cse for reduction ops

* reduction tests