Model Tensor Data Export and Import

[dmccloskey]

Description

A new method for exporting/importing model tensor data will be needed.

Objectives

• [x] implement the Eigen::IOFormat for tensor export
• [x] update ModelFile to support exporting model associated tensors

Validation

• [x] passing ModelFile tests

References

• https://eigen.tuxfamily.org/dox/structEigen_1_1IOFormat.html
• https://stackoverflow.com/questions/18400596/how-can-a-eigen-matrix-be-written-to-file-in-csv-format/23566993