Allow to see rooms of incompatible versions in the lobby For the new clients the room version is shown in a separate column. There is also a hack for previous versions clients: the room vesion specifier is prepended to the room names for rooms of incompatible versions, and the server shows 'incompatible version' error if the client tries to join them.

pub mod anteroom;
pub mod client;
pub mod events;
pub mod indexslab;
pub mod room;
pub mod server;
pub mod types;