Add submission # 2904

#2904

Author: ArduinoBot

registry.txt

@@ -5999,3 +5999,4 @@ https://github.com/zapta/serial_packets_arduino.git|Contributed|Serial_Packets
 https://github.com/flash62au/WiThrottleProtocol.git|Contributed|WiThrottleProtocol
 https://github.com/ArtronShop/ArtronShop_PCF85363.git|Contributed|ArtronShop_PCF85363
 https://github.com/JhoselinRam/gButton.git|Contributed|gButton
+https://github.com/tomasz90/two-buttons-interface.git|Contributed|TwoButtonsInterface