message: Adding link to ONNX viewer app
diff: @@ -29,6 +29,10 @@ Check ONNX design choices and internals:
  * [Versioning principles of the spec](docs/Versioning.md)
  * [Operators documentation](docs/Operators.md)
  +# Tools
  +* [Netron: a viewer for ONNX models](https://github.com/lutzroeder/Netron)
  +* [Net Drawer ONNX vizualizer](https://github.com/onnx/tutorials/blob/master/tutorials/VisualizingAModel.md)
  +
  # Contribute
  ONNX is a community project. We encourage you to join the effort and contribute feedback, ideas, and code. Check out our [contribution guide](https://github.com/onnx/onnx/blob/master/docs/CONTRIBUTING.md) to get started.
  