port to zmq nearly complete
got req/rep working
tweaks to the agent command
changed bind to be async
removes pub-emitter sub-emitter
verison bump v0.5.0
adds mocha and should dependencies for testing
adds tests
refactors xpub/xsub
refactored push/pull binding
bind servers are now async
listen now has non blocking parallel binding
tests multiple messages for pubsub
adds pushpull tests
adds tests for router/dealer
adds arbitrary channel support
small tweaks to tests
tested connection race conditions
fix for lazy worker connection
change exchanging of several messages