[contrasting] add quadratic model for gumbel/gev and location/scale. modify code for the name of the models

[contrasting] add assertion that the max_abs_change is different from np.inf otherwise it makes the computer freeze
IMPORTANT MODIFICATION, THAT MIGHT CHANGE PAPER 1: change unconstrained_estimator_gev_params to unconstrained_estimator_gev_params_last_year

[exceeding] add full diagnositic plot (qqplot & intensity plots) for gumbel stationary & add gumbel gof tests from r package

[exceeding] add full diagnositic plot (qqplot & intensity plots) for gumbel stationary & add gumbel gof tests from r package

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

[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)

[paper 1] add plot with the difference in return level (and relative difference) for the big shapes. we conclude that there is big difference indeed

[paper 2] add summer annual maxima, winter annual maxima in study. add script to highlight contrasting trends. improve plot for paper 1