Update "Codebook.html"
- add tv, movies, books, press and music batteries
- add attachment batteries
Update "ComputingMisc.R"
- add expr function (it generates formulas of a form ~ x1 + ... + xn
Add "Scaling/DatRed-CultPref.R (only the beginning)
Add "DatRed-CultPred.R" (finished)
Add new scales to "FullDatInd231.csv"
Add a new dataset: "Dane/MainDatInd231.csv"
- it does not contain the item banks