Refactor methods #44
Description
Refactor code. Instead of having a long list of methods, it will be better to have only: day and days.
Then, if the .JSON params season, latents are list, it will iterate along the lists.
Also, default n_execs should be 1. Then, if the .JSON provide a higher value of n_execs, the method will run that amount of executions, which means to make a principal loop with for i in range(n_execs):.
Also, this will help for post_process. Because now, it only run one time, independently of the method.