Added GoDoc badge
Added a description
Added node test
Shouldn't send beacons while quiting and do not block sending events

As well, do not block receiving commands
Immigrated to github.com/pebbe/zmq4

Now switching between zmq3 and zmq4 would be very easy
Do not export properties of Node
Migrated to ZRE 2.0-draft
Remove the peer if we get an unexpected command from it
Added Header method to retrieve specified header and/or its existence
Added a LICENSE
Improved strings implementation. This is part of ZRE 2.0