SocketReactor actually calls callbacks.
receive_all no longer tries to access out of bound array indexes.
fr::Packet constructor can now take as many arguments as you like and they'll be added to it automatically.
Added bool fr::Packet<< operator overload.
Sockets will immediately return fr::Socket::Status::Disconnected if an attempt to send/receive data is made whilst the connection is closed.
Added SocketReactor, which is effectively a little wrapper around fr::SocketSelector, but can automatically call a callback for a socket when data is received on it.
