use a singleton cookie jar
use a singleton cookie jar

The chat window had a bug where it would fail to load the first time a
user logged in, but on later app restarts it would be fine. Turns out it
was keeping a stale copy of the user's cookies. Using a cookie singleton
solves this problem.

oconnor663/fbmessenger,oconnor663/fbmessenger,oconnor663/fbmessenger