use sets for white/blacklists in auth
pass on logging in auth
don't set long reconnect interval in tests

causes failures on travis
pass on test_auth

consolidate some reusable code in base class and decorators
close zap_stream on auth.stop

addresses cleanup in tests
fix close callback timeout in zmqstream
travis is crazy slow
Merge pull request #469 from minrk/authpass

pass on zmq.auth