InboxNoticeStream::getNotices() no longer returns an ArrayWrapper;
just fetch notices normally via $notice->fetch(), so that
we can actually get the top notice-ID and update email_summary_status
accordingly--and not mail about the same notices repeatedly.
Also cleaned up and made typing stricter for the stream, so only
profiles can be submitted. This reasonably also means we can create
"inbox" or "all" streams for foreign profiles as well using the same
stream handler (but of course only for messages we already know about).
To avoid looking up posts for a long time in a large notice database,
the lookback period for the inbox is no longer than the profile creation
date. (this matches the behaviour of Inbox)
Inbox class can probably be removed now.
We're also now using $config['image']['jpegquality'] to determine the
quality setting for resized images.
To set Avatar max size, adjust $config['avatar']['maxsize']
The getAvatar call now throws exceptions too. Related changes applied.
Now let's move Profile->avatarUrl to the Avatar class!
lib/plugin.php now has a parent onAutoload function that finds most common
files that are used in plugins (actions, dataobjects, forms, libs etc.) if
they are put in the standardised directories ('actions', 'classes', 'forms',
'lib' and perhaps some others in the future).
