* Added GPU emitter for op::Result.
For now it simply copies the output tensor.

All but 3 tests now pass. The remaining
failing tests are:
* GPU.dot_0_0
* GPU.dot_matrix_2x0_0x2
* GPU.dot_2x0_0

* Removed call to handle memory aliasing in gpu_external_function.

* fix gpu emitter bug that will return in the middle of function

* Merge pull request #609 from NervanaSystems/tfl/fix_return_bug

fix gpu emitter bug that will return in the middle of function

* GPU backend skips added for recent softmax test and updated aliased output test that uses op::Constant.

* - Added support optimized bn mkldnn implementation in cpu emitter
- modified bn unit_test to support new implementation
- added layout assignment for bn op
- Style Fix

(cherry picked from commit 7747a40806d62c126059d5c873adcd2e61a0adb0)

* modified value initilization in cpu_fusion to be float explicit

(cherry picked from commit 03499d380073d0197ab8cbd154eb03f63b042a48)

* fix compilation issue

* Addressed PR comments
- added exception if gamma and beta layout isnot equal to memory::format::x
- throw exception if bn Op is not mkldnn op

* fix compilation issue

* added support to handle multiple o/ps in fprop bn fusion

* - Removed laytout pass for bn
- fixed autodiff bug in bn
- added "Add" for the dispatcher in cpu-layout pass

* style fix

* Fix bprop batchnorm test with get_output_elements

* Style fix

* CPU: Padded Convolution fusion

* CPU: Non-reshaped fusion pattern for zero-padded convolutions

* CPU: Refactor consistency checks

* CPU: Rewrite hoisted reshape expression and add tests

* CPU: Merge leftovers

* generalize matmulbias

fixes

disable logging

* unit-test failures

* the first stab at op::Result

format fixes

disabling logging

op::Result, 2nd attempt

purge stale code

disable logging

fix copyright header

* initial cleanup

* cleanup2

* remove dead code

* result.cpp, fix comments

* fix comment

* patch working

* wip

* fix patcher

* remove debug message:

* cleanup

* fix typo

Merge branch 'tfl/gpu_fix_constant_bug' of github.com:NervanaSystems/ngraph-cpp into tfl/gpu_fix_constant_bug

* add gpu broadcast

* add broadcast kernel

* fix bug for cumemdopyDtD usage in gpu_external_function.cpp

* limited parallel make processes to make -j 16 by default for contrib/docker/Makefile

* set the default to make -j 22 for parallel make in contrib/docker/Makefile

* cleanup

* cleanup

* fix all headers to be standalone as far as includes go

* include cleanup

* cleanup includes

* cleanup

* include tester

* wip

* cleanup

* cleanup

* cleanup

* Delete index.xsd

* Remove files added before gitignore was updated.

add softmax op and documentation

* one output

multiple outputs

initial clean-up

* test clean-up

current version

test pass

* clean up

* fix format

* add dbeta,dgamma asserts

* revert some files

* 0644 on node.cpp

* 0644 on mkldnn_utils.cpp

* 0644 on more files

* add support for serialization + test case

* fix merge errors

* Add aliased Constants to aliased_output test.

* add support for const as outputs

Cyphers/dochow