[COMPARISON] add class_property to abstract study, to enable spatial display of errors between SAFRAN reanalysis & data from observations

[HYPERCUBE VISUALIZER] fix big issue with respect to the "best year", take the year that minimizes the nllh

[HYPERCUBE VISUALIZER] deativate strength visualization. fix spatial visualization having np.nan values

[EXTREME ESTIMATOR][MAX STABLE] add test that check the possibility to fit max stable with 3D coordinates. This is working with all the max stable structure except Smith structure (see max_stable_fit.R for an example of the returned error)

[EXTREME ESTIMATOR][MAX STABLE] improve the exception error message when trying to sample with 3D coordinates and the wrong arguments

[EXTREME ESTIMATOR][MAX STABLE] add argument use_rmaxstab_with_2_coordinates to rmaxstab that makes it possible to sample dataset with 3D coordinates

[METEO FRANCE DATA][STATIONS] add final version of the first analysis of Reanalysis versus station measurements results

[METEO FRANCE DATA][STATIONS] add spatial comparison analysis with respect to the a linear evolution of the location parameter

[SCM] add 3 consecutive nb_days as default argument. add this argument for SWE and SD. Also add a test to SCM study

[COORDINATE] refactor starting year & df_temporal_coordinates. to normalize the same way any temporal covariate. So that each fit has the same type of normalized data as input. add multiple transformation.

[SCM][HYPERCUBE] refactor trend types for hypercube visualization. add the difference between real_trend_type & display_trend_type

[SCM][HYPERCUBE] remove run time error and no trend from trend plot. add Altitude_Hypercube_Year_Visualizer as an extension of Altitude_Hypercube_Visualizer

[SCM][HYPERCUBE] refactor trend analysis. use change of point test instead of tren test for the hypercube.

[SCM][HYPERCUBE] improve labelling of all the graphs. add test strength display in the spatial case.