Support websocket reconnections

[tsmith512]

In v3-beta, Websockets support is "dumb," if a socket drops, the client logs out and the server should treat the player as departed (although it currently seems not to). Then the player logs in again, creating a new player with a new ID (and a ghost of the previous connection that isn't playing anymore). Get the client to attempt to reconnect and make the server link a reconnect back to the existing player entry.