Add new view and controller action for 'rolling' NOC displays

[prioux]

Add a new view controller and an associated view that provides a slideshow of status displays for the NOC. The view would contain a single full screen IFRAME; its content would change every two minutes. The list of contents would initially default to /noc/daily but if the admins provides a customization file other pages could be shown. That file could be a JSON or YAML file with a list of pages and the number of seconds to display each of them, something like

---
- - "/noc/daily"
  - 120
- - "/noc/monthly"
  - 60
- - "/noc/graphs"
  - 60
- - "/credits"
  - 10

[prioux]

Note that in the example above, the actions, /noc/monthly and /noc/graphs don't exist right now. They're just examples.