Let Twitter-mod retrieve all available tweets in the timeline

It's not perfect, though, as it comes with the downside that re-syncing / auto-updating will also try to do that. Needs a way to store the most recent retrieved ID and set it as 'since_id'.

Fixed Twitter's API to use https connections, as http connections return 403 FORBIDDEN as of tonight. Should have put that in a separate pull-req, just as the style fixes - sorry for the inconvenience.