def transmit(client_id, message, reliable = false, channel = ChannelManager::CHAT)
      @server.send_packet(client_id, message, reliable, channel)
    end
def transmit(client_id, message, reliable = false, channel = ChannelManager::CHAT)
      @server.send_packet(client_id, message, reliable, channel)
    end
send message to a specific client
 @param client_id [Integer] ID of client
 @param message [String] message to be sent to client
 @param reliable [Boolean] whether or not the packet is guaranteed to be received by the client
 @param channel [Integer] what channel to send on