Localization by IP and italian localization

Added localization system by IP and italian localization
Site difficulty in sites.json now is:
0 for easy
1 for medium
2 for hard
3 for impossible

Example:

{
"name": "9GAG",
"url": "https://9gag.com/member/delete",
"difficulty": "0",
"notes": "Login to your account, go to parameters, click Delete my
account. Confirm by clicking I want to delete my account. And again by
clicking Delete my 9GAG account.",
"notes_it": "Logga il tuo account, vai su parameters, clicca Delete my
account. Conferma cliccando I want to delete my account. E ancora
cliccando Delete my 9GAG account."
},

/inc/script.js no more needed i moved the script inside dev.php to echo
php localization

Parent
https://github.com/rmlewisuk/justdelete.me/pull/144