#113 add function slaveGetId
#113 implement functions gatewayAddSlave and gatewayAddTransport
#113 add function transportGetType
#113 improve gatewayAddTransport
#113 improve gatewayAddTransport
#113 improve gatewayAddTransport and gatewayAddSlave
#113 improve gatewayOpen
#113 fix error, rename function slaveSendMsg