README: Added info about IRC channel and mailing list. (maybe it's not such a good idea until they have some members:)
README: Added info about IRC channel and mailing list. (maybe it's not such a
good idea until they have some members:)

cbrepo/celery,ask/celery,cbrepo/celery,WoLpH/celery,WoLpH/celery,mitsuhiko/celery,frac/celery,mitsuhiko/celery,ask/celery,frac/celery