Update requirements for go-http helper
Add new dev requirements file
Update settings for dummy vumi go http connection
Add base Vumi URL
Add param for task firing
New tasks and tests for sending messages out via Vumi
Add dev requirements to all Travis
Remove self bind on tasks now not in use
Potential optimisation on queries
Make timezone support work for auto updating updated at times
Add note on cloning model
Update initial migration as not live yet
Refactored to try and reduce possible race conditions
Docs seem to lean to count() being more efficient anyway
Merge branch 'feature/issue-14-add-scheduled-sender-task-detail' into develop