[WIP] Include addons code from travis-core.
Fix more failing tests, add pusher gem.
Fix IRC tests.
Fix email tests.
Fix email task specs.
Fix webhook tests.
Fix Pusher tests.
Require all the right files.
Use Sidekiq logger.
Bring back I18n for now.
Load Travis::Async.
Add Travis.uuid.
Extract some middleware files.
Log some real data.
Use the right object.
Add the job id for events starting with job.
Use payload rather than data to fetch job id.
Set a default assets host.
Log time used for a worker task.
Remove Sidekiq's logging, add jid to l2met logs.