TODO

• switch to UDP.
• have servers work as clients as well.
• add rest interface to communicate with peers: query the data, add new data, join, etc.
• use protocol buffers for encoding
• add simple json configuration file
• introduce the view: peer manages connections to peers in it's list: add, remove, cleanup
• peer sends data to all peers in it's list.
• peer sends data to subset of peers in it's list.
• [_] implement the join mechanism
• [_] add structure: separate communication from core state!
• [_] implement the communication protocol
• [_] investigate https://github.com/xtaci/kcp-go