Clean interaction between facility and control_panel apps

[bcipolli]

Currently I'm a bit unclear on the interactions. In general, I hope we could have the follow app and inter-app structures:

• Apps can stand alone. In this case, Facility app should be able to create/edit users, create/edit groups, create/edit facilities.
• Apps that want to modify other apps behavior import the other app, then override behaviors:
  • Import view functions and override things like redirects.
  • Override templates by adding a template with the same name to the overriding app's templates directory, then strategically setting the order of INSTALLED_APPS so the override is selected.

For the facility / control_panel interaction, I am most looking at the use of add/edit forms across the two apps.

[bcipolli]

@rtibbles your feedback on this one would be appreciated. I'm happy to do refactoring, but don't want to refactor things in ways that wind up being confusing.

[rtibbles]

I think it makes sense to have view code in facility that allows for the adding/editing of all facility models. Any additional functionality can then be added after being imported into control_panel for enhancement.

[bcipolli]

Refactoring = @bcipolli

[aronasorman]

0.13.