TestAgent.Responder now has .once (per event emitter spec)
Fixed XUnit reporter support
Added event mirroring support you can now send a message
to the server and all events of those types will be forwarded or
mirrored to your client websocket.
Added base node/client as a building block for new commands
improved test-agent test. It now offers an option of reporters and
will show reports in stdout with correct exit status on
error/success.