Consistency in the modules

[lmouline]

While implementing the prototype, I tried to make strict separation between the model and the different algorithms (load approximation, cycle funder, ...). The idea was that the model should not contain any data that is computed by an algorithm.

However, this is not a 1st design choice. So currently, there is a mix between this design choice and the previous one (algorithms that modify the model directly). It is the case, for example, for the UncertainLoad approximator

Those modules should be refactor to reflect the last design (or reflect the one selected while addressing #3 )