mnist load & run with onnxruntime

...projects/onnx/keras_ref/generated/vgg16/approxhpvm_src.cc

hpvm/projects/onnx/keras_ref/generated/vgg16/src.cc

hpvm/projects/onnx/keras_ref/keras_environment.yml

hpvm/projects/onnx/keras_ref/keras_frontend/__init__.py

...ts/onnx/keras_ref/keras_frontend/approxhpvm_translator.py

...ects/onnx/keras_ref/keras_frontend/hpvm_dfg_translator.py

...jects/onnx/keras_ref/keras_frontend/promise_translator.py

.../projects/onnx/keras_ref/keras_frontend/quantize_utils.py

hpvm/projects/onnx/keras_ref/keras_frontend/setup.py

hpvm/projects/onnx/keras_ref/keras_frontend/utils.py

hpvm/projects/onnx/keras_ref/keras_frontend/weight_utils.py

hpvm/projects/onnx/keras_ref/setup.py

hpvm/projects/onnx/keras_ref/src/alexnet.py

hpvm/projects/onnx/keras_ref/src/alexnet2.py

hpvm/projects/onnx/keras_ref/src/lenet.py

hpvm/projects/onnx/keras_ref/src/mobilenet_cifar10.py

hpvm/projects/onnx/keras_ref/src/mobilenet_shallow.py

hpvm/projects/onnx/keras_ref/src/mobilenetv2_cifar10.py

hpvm/projects/onnx/keras_ref/src/resnet.py

hpvm/projects/onnx/keras_ref/src/vgg16_cifar10.py