The Twitter 1.0 REST API has been retired:
https://twitter.com/twitterapi/status/344542397608361984
The "old" search, used in "AGPagingBody_Twitter.m" is returning 410 status code:
https://dev.twitter.com/docs/faq#17750
Currently, we can no longer use the Twitter "search", since the NEW (1.1) API version REQUIRES authentication:
https://dev.twitter.com/docs/api/1.1/get/search/tweets