Perf: Country id+code is now stored into MAIN_INFO_SOCIETE_PAYS instead of only id. This avoid a select to finf country code at each request.

Fix: select_array is deprecated

Restore lang files into global lang directory. Usage of lang into modules directory must be used only for external modules to be self-dependent but must be kept for dolibarr core feature into unique htdocs/langs directory as this make working on translation a big headache and break a lot of automated translation tools.

New: Can make email for third party or users required