Correction in the exercise instructions

Correction in the instructions of a A02Lc_nuage exercise

New version to A01La_outils learnr for module 1

A01LA_outils updated to version 3.

Switch form {learndown} to {learnitdown}

v2021.0.0

Further {learndown} -> {learnitdown}

A12La_correlation learnr for module 12

v2020.11.1

new version of package

New version to A11Lb_syntaxr learnr for module 11

v2020.10.0

new version

improved exercise guidelines in A11La_anova2

improved exercise guidelines for interaction plot in A11La_anova2

A11La_anova2 learnr for module 11

v2020.9.0

new version

improved exercise guidelines in A09Lb_ttest_wmw

improved exercise guidelines for weight loss in A09Lb

A10La_anova learnr for module 10

The learnr A10La_anova is converted into version 2 and integrated into the package

Final tutorials for module 9

final revision of the two learnrs for module 9.