Tests for extract_user_mentions fake_twitter helper
Add tests for FakeTweet.to_dict
More tests for FakeTwitterApi.statuses_mention_timelines
More tests for FakeTwitterApi.statuses_user_timelines (along with fixes)
Tests and fixes for FakeTwitterAPI.stream_filter
Tests for FakeTwitterData
Merge branch 'feature/issue-9-add-direct-message-support-to-the-fake-twitter-api' into feature/issue-11-tests-for-uncovered-things-in-fake-twitter

Conflicts:
	txtwitter/tests/test_fake_twitter.py
Merge branch 'develop' into feature/issue-11-tests-for-uncovered-things-in-fake-twitter

Conflicts:
	txtwitter/tests/test_fake_twitter.py
Get rid of datetime patching for fake_twitter tests (we don't need it since we can override created_at when creating users, tweets and dms)
Merge branch 'develop' into feature/issue-11-tests-for-uncovered-things-in-fake-twitter
Merge branch 'feature/issue-11-tests-for-uncovered-things-in-fake-twitter' into develop