Add Message Broker calls to user events.
Add activity timestamp.
Vote event should be triggered by vote model, not other way around.
Add configuration for vote queue.
Add some candidate information in the vote event payload.
Added country code to user payload.

Only filled on production, where Fastly header is set. Otherwise this
will be null.
Add MailChimp group ID and group name.
Get birthdate as timestamp for Message Broker.
Update birthdate label & properly call model function.
Merge pull request #161 from DoSomething/message-brokery

Add Message Broker calls to user events.