Implement the /reveal,/start endpoints as well as the "game-state" event

Implement the /reveal,/start endpoints as well as the "game-state" event

This brings us up to protocol version 0.5 and should be a pretty
playable server at this point. Upon receiving the "/reveal" API
request the server will transition to the "reveal" game-state and from
there will broadcast the names of each character to all clients, one
name every three seconds, (and sending an empty name at the end to
clear off the last name). The "/reveal" API request can be sent
additional times if the players want to see the names again.