def broadcast(message, reliable = false, channel = ChannelManager::CHAT)
      @server.broadcast_packet(message, reliable, channel)
    end
def broadcast(message, reliable = false, channel = ChannelManager::CHAT)
      @server.broadcast_packet(message, reliable, channel)
    end
send message to all connected clients
 @param message [String] message to be sent to clients
 @param reliable [Boolean] whether or not the packet is guaranteed to be received by the clients
 @param channel [Integer] what channel to send on