Updated to Twitter 1.1 API

Updated to Twitter 1.1 API because getting a list's tweets through the urls and `requests` was no longer valid. Getting a list's tweets requires oauth and returns a python object as opposed to a JSON object. As a result, JSON `obj['prop']` syntax no longer valid -- now requires dot notation. Fixed indent on last except. Removed `import requests` because now all requests are handled through `tweepy`.