move the saveNewTweet function from just inside the express.js to a static function on FeedSchema here
moved saveNewTweet function to be part of the FeedSchema itself, and add handling for tstream.on("delete" to actually delete Feed item from our DB. still can clean this more
comment out unused hasAuthorization function until sometime if we actually need it?
instead of having Feed nested properties author: { id, name, screen_name } and source: { from, url }, just store author (screen_name), author_id, source, & url right on it
add the twitter stream delete handler to a static on the Feed Schema ?!
move ~172 lines of Places Twitter initialization & Stream setup from express.js to static method(s) in Place Schema