Reproducibility

Created by: mlober

This PR aims to improve reproducibility by setting the default parameters to those used to produce the dynamics of the metastable state in Schmidt et al. (2018). It also removes redundancies such as the stabilization matrix K_stable.npy and unused parameters in default_parameters.py.

In the README and code one now finds a small description on how to run the model in the ground and metastable state. This might need refining.

In addition, it adds a missing object "structure_revered" to the model class that is needed for analysis.