[issues/#45+#49] Add SPacket type
[issues/#45+#49] Add SPacket type

TheThingsNetwork/ttn,jvanmalder/ttn,mgranberry/ttn,jvanmalder/ttn,jvanmalder/ttn,mgranberry/ttn,LoRaWanSoFa/ttn,LoRaWanSoFa/ttn,TheThingsNetwork/ttn,TheThingsNetwork/ttn,mgranberry/ttn