Updated the set_selected_sim() method to the new relax design.
Updated the set_selected_sim() method to the new design.
Converted the select_all_sims() function to the new design.
Fixed all specific function setups in the Monte Carlo sim module.
Updated the setup() function to the new design.
Updated the create_data() function to the new design.
Removed an unused import.
Converted all class methods to module functions.
A few changes to tidy up the module.
Added a module docstring.