Allow to delete website notifications.
Show a message when there are no notifications.
Delete from 'unapproved_comment_notification' when deleting from 'notification'.
Add a page for archived notifications.
Allow to unarchive notifications.
Add 'updateNotificationArchived'.
Add 'proxyNotifications'.
Merge commit 'refs/merge-requests/44' of gitorious.org:snowdrift/snowdrift into merge_request_44