Fix sign of singular vectors for consistency with FactoMineR.
Add BootstrapVector and JackknifeVector classes to store bootstrap and jackknife resampling values (inherit from base numeric).
CRAN release: 2021-05-17
Bugfixes & changes
Fix row names in build_results(). When initializing a MultivariateResults object with supplementary observations, the row names of the standard and contributions matrices were incorrect (computation moves all supplementary points at the end of the results).