Constructing several new Simulink models/blocks in a loop (for counterexamples)

[nikos-kekatos]

Currently, it is possible to automatically construct one Simulink model for one training iteration. However, for each counterexample we might need to keep the previous neural net blocks either for testing or for debugging reasons.

This implies that we should either

1. Store each model/block as a new file and iterate over these files

2. Inside each file create a copy of the closed-loop system and replace the NN-block with the new NN (obtained after retraining). How to create a copy of the closed-loop programmatically via Matlab might not be easy (To-DO: add a new issue and link it)

[nikos-kekatos]

This requires the successful treatment of #13.