Update basic_attiny/basic_attiny.ino, basic_attiny_timer/basic_attiny_timer.ino, schematic_hub.png, basic_mqtt_gateway/iconset.h, basic_mqtt_gateway/resources.cpp, basic_receiver/basic_receiver.ino, basic_sender_binary/basic_sender_binary.ino, basic_sender_ht/basic_sender_ht.ino, schematic_contact_sensor.png, schematic_temperature_sensor.png, README.md, basic_mqtt_gateway/basic_mqtt_gateway.ino, hub3_enclosure_case.stl, enclosure_preview.png