* Added missing LICENSE.TXT file
* HAL & Packet Forwarder: added support for sx1250-based reference design for
CN490 region
* Packet Forwarder: disabled beaconing by default
* Fixed compilation warnings reported by latest versions of GCC
* Reworked handling of temperature sensor
* Clean-up of unused files
* Added instructions and configuration files for packet forwarder auto-start
with systemd
* Added SX1250 radio calibration at startup