doc(README) add a Rmd file in order to generate the README files (md and HTML)
doc(README) add chunk of R code in doc
feat(script) add holidays column to data
feat(functions) continue exploratory analysis (holidays, weekdays/weekend)
feat(script) add a new script to manipulate data (add sex column, add frequency information)
feat(script) add a new script to analyse holidays impact on data
params(rstudio) save RStudio environnment
doc(README) merge doc with distant repo