Refactoring controller actions into modules

This allows the host app to exploit the modules in their own
controllers.
Also required the rename of the #status action to #job_status,
as this appears to be a magic name.
Adding config for job_resource_name and archived_job_resource_name

This is to allow the host app to define where these resources are
accessed.
Update README for use of controller mix-in modules.
Update controller actions and views to use configured resource names.