Added the ability to perform Monte Carlo sims for the Frame Order theories.
For this, the following methods have been added:
__tensor_loop()
back_calc()
base_data_loop()
create_mc_data()
data_names()
model_loop()
return_error()
set_selected_sim()
sim_init_values()
sim_pack_data()
sim_return_param()
sim_return_selected()
