Cleanup
Don't load Podcast content unless necessary (inside cache)
Job cleanup

* Add "@priority" to jobs - specifying the priority this job has.
  This is used to determine which queue the job should be placed on.
* Make sure all jobs use `class << self` instead of `self.`
* Rename the notification jobs to be more generic.
* Some doc cleanup that shouldn't be in this commit but oh well.
Email publishing cleanup

* Move all e-mail methods for EloquaSendable into a single
  `as_eloqua_email` method, for better containment.
* Remove the unsubscribe link from the breaking news Text template.
* Fix the api_config.yml.ci test config for eloqua