onnx2

This implements parsing and serialization of onnx classes without protobuf.

• helper
  • TensorDtypeMap
  • get_attribute_value()
  • make_attribute()
  • make_attribute_ref()
  • make_empty_tensor_value_info()
  • make_function()
  • make_graph()
  • make_map_type_proto()
  • make_model()
  • make_node()
  • make_operatorsetid()
  • make_opsetid()
  • make_optional_type_proto()
  • make_sequence_type_proto()
  • make_sparse_tensor()
  • make_sparse_tensor_type_proto()
  • make_sparse_tensor_value_info()
  • make_tensor()
  • make_tensor_sequence_value_info()
  • make_tensor_type_proto()
  • make_tensor_value_info()
  • make_value_info()
  • set_metadata_props()
  • set_model_props()
  • tensor_dtype_to_field()
  • tensor_dtype_to_np_dtype()
• io_helper
  • load()
  • save()
• Serializing, Parsing Options
• protos
  • AttributeProto
  • DeviceConfigurationProto
  • FunctionProto
  • GraphProto
  • IntIntListEntryProto
  • Message
  • ModelProto
  • NodeDeviceConfigurationProto
  • NodeProto
  • OperatorSetIdProto
  • OperatorStatus
  • ShardedDimProto
  • ShardingSpecProto
  • SimpleShardedDimProto
  • SparseTensorProto
  • StringStringEntryProto
  • TensorAnnotation
  • TensorProto
  • TensorShapeProto
  • TypeProto
  • ValueInfoProto