Configuration is broken as twitter removed the json conf file

[sylvestre]

This code doesn't work anymore: https://github.com/bear/python-twitter/blob/acd947210b12464baa10d8c05d0b5abe33b73683/twitter/api.py#L355

Error 410 (Gone): https://api.twitter.com/1.1/help/configuration.json

Announced here: https://twittercommunity.com/t/retiring-the-1-1-configuration-endpoint/153319