Add all your friends to a Facebook group at once with script

Tutorial by Saqib.
How to add all your friends to a Facebook group at once with script.
Facebook Invite Trick.
Code link: https://13d671cf750f38918e3ac488321fd30d1c4813f7.googledrive.com/host/0B_1mqJd2tC8qQmpKR3pMcEdKV2M