[contrasting project] fix memory issue that was happening while loading many precipitation studies. issue #300

[contrasting project] fix memory issue that was happening while loading many precipitation studies. issue #300

[quantile regression project] refactor simulations. add transformed coordinate to the quantile functions

[quantile regression project] refactor imports for quantile estimators. two fix: nb_obs=1 in GevSimulation.py and df_merged correspond to df_coordinates from now on (such as it takes into account the transformation if there is one)

[refactor] refactor test_quantile_estimator.py. Quantile estimators works for any temporal coordinates.

[refactor] remove scores. remove non_stationary_trends, delete univariate_test_results that was deprecated

[paper 1] add plot for the presentation. increase the size of the legend for uncertainty curves. add sample function for the GevParams class.

[paper 1] modify the source of data (use the last version from AERIS) and shift the year being used (now study go from 1959 to 2019)