Properly handle each contact channel on the backend
Add unsubscribed_at column to subscriptions
Handle unsubscribes from twilio
Ensure jobs are not queued for dead subscriptions
Require area code for phone numbers
Back out logic to skip retries for unsubscribed numbers

Unsubscribes are now handled by citygram
Move require statement
Merge pull request #67 from codeforamerica/unsubscribes

Unsubscribes