add tool for translation statistics

[Aigrefin]

Hi,

This basic tool helps detect missing translations and gives warnings when a field seems to have been copy-pasted instead of translated. It also gives a warning when the english translations of the extension are different from the ones of the eng.xml file.

Usage : cd tools lua translations_status.lua

Example output :

-- missing lang files alb scc jpn ben mal vie -- missing translation keys rum mess_err_wrong_path rum mess_err_cant_download_interface_translation hun mess_err_wrong_path hun mess_err_cant_download_interface_translation eng mess_err_wrong_path eng mess_err_cant_download_interface_translation eng mess_err_conf_access slo int_no_support_mess slo int_os_password slo int_os_username -- translations equal to the english version -- or xml english translation different from program english translation rum int_config rum int_ok hun int_ok baq int_searching_transl baq int_search_transl eng mess_err_wrong_path eng mess_err_cant_download_interface_translation eng mess_err_conf_access eng int_help_mess eng action_search eng mess_not_load eng int_no_support_mess eng int_os_password eng int_os_username eng action_hash slo int_ok