IOT Gateway Setup feature. ES-145

recipes-connectivity/hostapd/hostapd_2.5.bbappend

recipes-extended/iot-gateway-setup-button/files/gpio-utils.c

recipes-extended/iot-gateway-setup-button/files/gpio-utils.h

recipes-extended/iot-gateway-setup-button/files/gpio-utils.o

...iot-gateway-setup-button/files/iot-gateway-setup-button.c

.../iot-gateway-setup-button/files/iot-gateway-setup-buttond

recipes-extended/iot-gateway-setup-button/files/led_test.o

...nded/iot-gateway-setup-button/iot-gateway-setup-button.bb

recipes-extended/iot-gateway-setup/files/dnsmasq.conf

recipes-extended/iot-gateway-setup/files/hostapd.conf

...extended/iot-gateway-setup/files/iot-gateway-setup-server

recipes-extended/iot-gateway-setup/iot-gateway-setup.bb

recipes-support/dnsmasq/dnsmasq_2.76.bbappend