nGraph-MXNet V 0.5.1

This is a major release of nGraph-MXNet, providing:

1. pip installation support for the first time
2. Support for MXNet's Subgraph API
3. Improved inference performance on a number of models.

v0.5.0 RC1 Release Candidate

update to ngraph v0.10.1 (#508)

* update to ngraph v0.10.1

* update to bridge master

v0.5.0 RC2 Release Candidate

update readme (#506)

* update readme

* re-arrange sections

v0.5.0 RC1 Release Candidate

ngraph-v0.5.0_rc1

update to bridge master (#505)

v0.5.0 RC0 Release Candidate

 Update Readme for Graph_mxnet (#503)

* Update Readme

* Update Readme 2

* Update Readme 3

* Update Readme 4

* Update Readme 5

* Update Readme 6

* simplify binary install instructdions

* fix format issue

Alpha release with direct Graph Executor Integration

Lnguyen/update readme (#402)

* Update NGRAPH_README.md

* Skip test_imageiter

Updates to Ops and NNVM Graph Handling

More Consistent NNVM Graph handling
Faster Inference on Resnet-50
Additional Op support toward Sockey NMT models

Integration of NDArray into the nGraph-MXNet Bridge

Update nGraph to v0.2.1
Improved handling of Sparse Tensors and NDArray
OpenMP Bug fix

Initial Release of MXNet with nGraph as a backend

For current status and build instructions, please see NGRAPH_README.txt