New admin: change GAE version to 'new-admin'
New admin: /admin-all-organizations: add search/filtering

Remove old admin_inactive_organizations_handler.
New admin: /admin-display-contacts: remove redundant sort links
New admin: add to work order search
New admin: add placeholder for export work orders
fabfile: check GAE version before deploy (rolling version model)
fabfile: add check task
fabfile: set GAE app version using branch name, or directly

Conflicts:
	sandy-disaster-recovery/app.yaml.template
	sandy-disaster-recovery/fabfile.py