v1.7.0 Release

[darksidelemm]

Changes:

• Initial Weathex WxR-301D support, now in use in Malaysia. Detection of these will likely not occur correctly, so it is recommended that always_scan entries are used.
• Support for a 'wideband' detection mode, which should improve detection and decoding of wideband iMet-1/4 radiosondes.
• Better handling of missing rtl-sdr utilities (an error message will now be emitted)
• auto_rx should now shut down cleanly in the case of an SDR failure, allowing a restart by docker or systemd.
• Fix rotator pointing threshold calculations when near 0 degrees azimuth.
• Move detection and decode IQ recordings to the log directory, to enable them to be more easily accessed if running auto_rx in a docker container.
• Fixes to Skew-T calculations in the web interface.