Create scalable automatic deployment for i18n-files (csv2po, .mo)

[fzesch]

The page needs to be internationalized in many languages. For facilitating future releases with many languages, I would like to have an automatic deployment process fulfilling following requirements:

1. Accept as input csv (utf8-encoding) and create .po-files. (e.g. with csv2po) in folders according to folder structure implemented.
2. Create .mo-files from .po-files in (e.g. with "msgfmt -o messages.mo messages.po"
3. Automatic creation of language selection dropdown menu on website with languages available

[fzesch]

Fixed with xls2py in locales folder. But we should still move to Transifex.