Implement auto-following in Twitter transport
Bump txTwitter dependency: 0.1.3a -> 0.1.4a
Move assertions that don't need to be in log catcher withs out of them for twitter auto-follow tests
Better assertion for auto-follow test
Merge branch 'feature/issue-752-autofollowing-for-twitter-transport' into develop
Merge branch 'develop' of github.com:praekelt/vumi into develop