/vine/submit GET and POST implemented. linkExtractor improved. Use npm install (moment.js).

Currently posts[i].poster contains the Facebook ID. We need to change this to the username but I dunno how to get that from the session. A db call just for that is too expensive.
Other than that it extracts the link and submits to the db correctly. Tucks in a previous_poster field if a similar post exist in the db (<= ORIGINALITY_LIFETIME hours old) but only if the previous_poster != poster (We need to disable this entirely, but that is for later).

moment.js used for time manipulation and general ease of use. Good job with npm start btw :)

linkExtractor now supports err as the first argument in the callback.

Exceptions! Exceptions Everywhere!