I should be able to archive a Space

(User Story, Closed -> Fixed, Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Data Model
Summary: Note that I'm not worrying about accessing archived Spaces quite yet; I just want a way to clean up a bit.
This still needs a Big Red Button, and should only be available to the owner. There should be a warning that, for the moment, there is no way to access or restore Archived Spaces, although that will come in the future. (As will actually deleting a Space permanently.)
Archived Spaces are not displayed under My Spaces, and the Space Manager will not load one, nor acknowledge its existence.