this will go through all messages in a facebook message thread. 
1. a facebook
2. to become a developer on facebook complete with appID and secret
2.5 apparently facebook also requires you have a url to have your app on. so also a server with a domain name that facebook likes.
3. a thread id that you want all the contents of


i would like to have attachments also on here but that's a reported bug atm.
sorry no selfies

you will need to login through the test.php 
which will redirect you to index.php
and you can keep refreshing until you get to the end of your messages.
you can make this a cronjob


currently outputs to a CSV