Facility delete as an API call

This depends on #1951

Deletes the facility, posts a message, then reloads the page.

To Test: 

* Install KA Lite before registering (currently, once registered, delete doesn't work)
* Create a facility
* Go to the overview page, and click the delete button.

Testing:

* Tested as above (delete works)
* Tested on registered machine, manually forcing buttons to appear.  Gives correct error.
![image](https://cloud.githubusercontent.com/assets/4072455/2686555/a481efb2-c20d-11e3-8f57-1be87ddfb63d.png)