Add thread safe queue. Use to push updates to client.

[eow] / setup.lisp

(asdf:oos 'asdf:load-op "eow")
(hunchentoot:start-server :port 4242)
(setf hunchentoot:*show-lisp-backtraces-p* t)
(setf hunchentoot:*show-lisp-errors-p* t)
(empire-web:start)