explor 0.2.1
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* Bugfix : core dump in explor.MCA when only one supplementary qualitative variable
* Bugfix : No variable plot when missing `scale` argument in `dudi.pca`
* Fix test failing with next `testthat` version


explor 0.2
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* Add ability to select points with lasso
* Add ellipses to color mapping variables
* Add ability to color individual points according to one of the qualitative variables in MCA
* Add control to hide Rows or Columns in CA plot and tables
* Add the ability to change point size and sizes range in variables plots for CA and MCA.

explor 0.1
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* First version
