Refactoring org_management javascript code to a separate file.
Set up ajax-based org and zone deletions.
Code cleanup.
Move delete_zone code to central app (where it belongs, it depends on `Organization`!)
Method for simple specification of back-end/front-end AJAX interaction
Migrate facility app to use new method for back-end / front-end interaction.
Tweaking success and error messages to be more explicit in what object is being manipulated.
Code review changes: adding missing import.
Fixing up tests.
Fixing up static URLs to work regardless of server, DEBUG
Small bugfix, removing outdated tests.
To ensure only users that are selected are moved between groups
pass user id not username as value in facility_management view.
In group move API search by id not username.
Tweak to URL conf, for consistency.
Merge pull request #116 from bcipolli/1950

Make zone and org deletions use AJAX requests
Basic code for doing deletion stubs locally.  Will not propagate remotely.
Removing is_deletable code.
Remove need for add_syncing_models
Introduce (debug) settings to allow deletions and viewing of deleted objects.
Introduce all_objects manager, which will always return deleted (and not-deleted) objects.
Work-around for validation issue on save, where deleted foreign keys can't be found (they're hidden!)