ignore listen() when closed or already listening
don't throw on double close()
0.7.5
remove console.log
debug@1.0.0
0.7.6
allow overriding bootstrap array
simplify basic test
add docs for constructor
prepare for bootstrap server
add ping message
remove unused buckets impl
add findNode and sendError
add readme warning about refactor
add once
add getPeers
add announcePeer
friendlier return types and start of recursive lookup
add recursive lookup (not working yet)
dns resolve bootstrap servers

so transactions object works