Simplify Project status field

Summary:
This was a sort of speculative feature added by a contributor some time ago and
just serves as a label; for now, simplify it into "active" and "archived" and
remove "archived" projects from the "active" list.

• Fix a bug where we'd publish a "renamed from X to X" transaction that had no

effect.

• Publish stories about status changes.
• Remove the "edit affiliation" controller, which has no links in the UI

(effectively replaced by join/leave links).

• Add query/conduit support.

Test Plan: Edited the status of several projects.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T681

Differential Revision: https://secure.phabricator.com/D1573